Search: science [planets/stars]

Number of results: 48,018

7th grade science
The planets orbiting a star can make it "wobble", because while it is obvious that the star gravitationally influences the motion of the planets, gravitational attraction is a two-way affect, and the planets also influence the star's motion (though since they are...
Tuesday, April 28, 2009 at 9:16pm by RickP

astronomy
False. Retrograde motion is something that the outer planets do relative to the background stars, when they are on the same side of the sun as the earth (at which time they are seen most of the night). Usually, the orbital motion of the planets causes them to move eastward ...
Saturday, March 27, 2010 at 9:19pm by drwls

Science
Describe how the rotation of Earth is responsible for the movement of the stars. The rotation of earth is responsible for the movement of stars because as it rotates, objects around it rotate as well, such as planets, they appear to move through the stars because they are that...
Friday, February 5, 2010 at 8:54pm by Sara

Science-Repost
Describe how the rotation of Earth is responsible for the movement of the stars. The rotation of earth is responsible for the movement of stars because as it rotates, objects around it rotate as well, such as planets, they appear to move through the stars because they are that...
Saturday, February 6, 2010 at 3:13pm by Sara

Astronomy
Retrograde motion describe the A backward motion of the stars relative to Earth B uniform circular motion exhibited by the planets C irregular speeds at which the planet travel. D backward motion of the planets with respect to the stars I think the answer is A But my book ...
Sunday, March 28, 2010 at 6:34pm by B

astronomy
what is search for extrasolar planets? Looking for planets around stars other than our own sun.
Saturday, May 5, 2007 at 2:29am by gopal

Science
Planets shine by reflected sunlight. How can planets be brighter than stars? Approxinmately how many times brighter than Mars is Earth's full moon? (i do know the Moon's apparent magnitude equals -12.6) Could we see the sun if it were 32.6 light years from Earth?
Sunday, April 19, 2009 at 3:25pm by Maeve

science
On a clear night, Ram correctly identified some clouds among the stars as the Milky Way. What part of the Milky Way was MOST visible to Ram? a]asteroids b]dust c]planets d]stars I think it is ethier b or d. Please help. Appreciative. ;]
Wednesday, March 27, 2013 at 5:28pm by Izzy

7th grade science
How does the gravity of planets and moons affect stars? Thanks!
Tuesday, April 28, 2009 at 9:16pm by Jordyn

Science
Describe the apparent motion of the stars and planets that is caused by the revolution and rotation of the earth.
Monday, March 11, 2013 at 1:01pm by Aj

Physics - Planets
This usually refers to planets discovered around stars other than the sun. None have been acually "seen" so far. Their presence can be inferred from period shifts in the velocity of the central star (from a Doppler shift of the frequency of prominent spectral lines) ...
Monday, August 23, 2010 at 7:41am by drwls

Science
Y r the distances to the planets given in km, while the distances to stars & galaxies r given in light years? I am really stumped on this quest. I think because the universe is so huge that it would be way too dificult to measure distances to stars and galaxies in km. Your...
Monday, February 22, 2010 at 9:21pm by Sara

science
Now you can reason this one out. We are talking about planets Not stars (stellar) Not nebula not fusion so ----
Wednesday, October 22, 2008 at 7:22pm by Damon

Science; Solar System
True or False 5. The outer planets are small, rocky planets with iron cores. true false 6. It is unlikely that the sun formed alone. It probably formed with a cluster of stars like the sun. true false
Monday, January 28, 2013 at 12:02pm by Jman

science [planets/stars]
Hey.. Well, first things first.. I'm given an assignment from my Earth Science class. Right now we're doing a unit about planets and Earth and sun. My teacher told us to write a [maximum] 2 page essay, which is also supposed to be descriptive. In the essay, we have to ...
Tuesday, May 19, 2009 at 11:04am by xxxx

Science this is very important and urgent
The largest "objects" in galaxies are stars or collections of stars called clusters. A large number of star clusters called "globular clusters" are located just outside the galaxy, as well as inside it. Half or more of the stars probably have planets. There...
Monday, May 4, 2009 at 11:06pm by Samaritan

Science
How do you compare and contrast the distances between the planets in the solar system. Which planets are relitively close together and which planets are far apart?
Saturday, December 1, 2007 at 5:16pm by Chandni

science
Geocentric" means that the earth is the center of the unvierse, including the sun, the moon, the planets, and all the stars. Is the universe geocentric? yes no yes
Monday, August 16, 2010 at 1:05pm by carl

7th grade science
Which planets, moons and stars? The effect of gravity is mutual, with the effect on the stars directly related to the relative size of its planets and moons and inversely related to the distance of them from the star. However, multiple planets and moons may cancel out or ...
Tuesday, April 28, 2009 at 9:16pm by PsyDAG

Science
According to science, the fastest speed posssible for anything is the speed of light. The speed of light is about 186,000 mies per second. That means taht in one minute, lighttravels 11,160,000 miles. The star nearest Earth is the Sun. It's about 93,000,000 miles from ...
Sunday, July 8, 2012 at 4:37pm by Rafi

science
What important characteristics do scientific theories and laws have? a) is always about planets and stars b) is correct and scientific c) explains and predicts d) is the same as a hypothesis c
Sunday, September 5, 2010 at 10:27am by pam

science
how early south africans incorporated the stars into their world, explaining how they used the stars to mark seasons and events and retelling some legends and stories linked with specific stars and constellations
Sunday, August 30, 2009 at 6:45am by navi

geology
why do planets appear to move with respect to stars?
Tuesday, September 11, 2012 at 12:51pm by k

reading
According to science, the fastest speed possible for anything is the speed of light. The speed of light is about 186,000 miles per second. That means that in one minute, light travels 11,160,000 miles. The star nearest Earth is the Sun. It's about 93,000,000 miles from ...
Tuesday, February 19, 2013 at 7:41pm by Anonymous

science
Our solar system consists of_____? a) the moon and the planets b) the sun and the planets c) the sun and the moon d) the sun and the planets with their moons Just need to know if my answer or right or wrong. Thanks! :) d
Wednesday, August 18, 2010 at 5:32pm by ant

space
There are many things which fit here: asteroids meteors planets Moons stars
Tuesday, November 9, 2010 at 5:23pm by bobpursley

Universe and the Stars-Please Check
IT is ok, but one thing is the color of the stars is telling: clusters consist of yellow, red stars, not the hot blue stars. That in itself indicates an older system.
Monday, March 1, 2010 at 7:42pm by bobpursley

science planets
how dos the alignment of the planets cause seasons?
Wednesday, March 24, 2010 at 9:55am by leyla

Astronomy
Which one supports the solar nebula theory of the origin of the solar system? a.Disks are rare around young stars. b.Disks are common around young stars. c.The sun is the least massive object in the solar system. d.Planets are round.
Tuesday, November 23, 2010 at 12:34am by Stephanie

Physical science
How early did s.a incorporated the stars into their world explaing how they used stars to mark seasons and events events and retelling some legends and some stories linked with specific stars and constellations
Sunday, April 10, 2011 at 12:35pm by Popularity

Science 5
What are the characteristics of globular cluster stars? A.no stars as hot as our Sun B.old age and hundreds of thousands to millions of member stars C.no main sequence stars left, with billions of member stars D.a few hundred stars, most still on the main sequence E.hundreds ...
Tuesday, November 7, 2006 at 9:19pm by Liz

Science
The substandard English did not help me to understand your question (^ r, etc.) Try here: http://www.google.com/search?q=why+distances+to++planets+are+given+in+km+but+distances+to+stars+%26+galazies+in+light+years&ie=utf-8&oe=utf-8&aq=t&rls=org.mozilla:en-US:...
Monday, February 22, 2010 at 7:29pm by SraJMcGin

Science
Y r the distances to the planets given in km? I've already answered the 2nd part to this question, and this is the fist part. I think that the distances to the planets are given in kilometres because all the planets aren't that far away from eachother that they need to...
Monday, February 22, 2010 at 10:07pm by Sara

Science
Do I have these correct according to the H-R Diagram? Hot (blue stars) are on the left side of the modern H-R diagram bright stars are the top of modern H-R diagram cool (red) stars are the ride side side of modern H-R diagram dim stars are the bottom of modern H-R diagram
Tuesday, October 14, 2008 at 8:32pm by Tyler

Science-drwls
Y r the distances to the planets given in km? I've already answered the 2nd part to this question, and this is the fist part. I think that the distances to the planets are given in kilometres because all the planets aren't that far away from eachother that they need to...
Monday, February 22, 2010 at 11:24pm by Sara

Science
As they age, _________ stars move up and to the right on an H-R diagram? Is it the bright stars?
Tuesday, October 14, 2008 at 8:35pm by Tyler

REALLY EASY
Which of the following are a consequence of the Earth's yearly motion around the Sun? (check all that apply) 1.the Sun appears in different constellations in different seasons 2.the planets look different than stars 3.the Sun rises and sets 4.the Moon exhibits phases 5....
Monday, September 19, 2011 at 8:26pm by Kristina

science
why are stars shaped in a star form All stars are spheres. Their own gravity forces then to take that shape
Monday, October 23, 2006 at 8:19pm by nicole

science
i'm not sure witch statement is true .The earth has a stronger gravitational pull than the Sun because it is smaller in mass. .Planets would travel in a straight line if it weren't for the force of the Sun's gravity. .The Sun's gravitational pull is weaker on ...
Thursday, October 23, 2008 at 6:14pm by Alie

Science (planets/gravity)
What keeps all the planets the big ones and the small ones in orbit in our big solar system? A.The gravity from the sun. B.The gravity from the moon. C.The gravity between all the planets. D.The gravity from the beautiful our earth. What do all the planets orbit around? the ...
Wednesday, April 18, 2007 at 4:50pm by Hot stuff

science
Do you mean why are the planets' moons cloeser to their respective planets? Because of the respective planet's gravity pull...
Monday, April 20, 2009 at 7:37pm by arya

physics
a spacecraft is traveling in space fa from any planets or stars. How much force is required to maintainthe spacecraft's speed?
Wednesday, June 13, 2012 at 11:28pm by Louis

science
What makes the subject of star formation so difficult and complex A It is so slow that no visible proof of of it exists B Star formation is too expensive to study in detail C Stars live too long to be observed from birth to death D Clouds, fragments, protostars, stars, and ...
Thursday, February 8, 2007 at 8:02am by bolometric

Science
Have I matched the right Scientists with these famous sayings: Scientists: Ptolemy, Kepler, Copernicus, Newton, Galileo, Brahe & Hubble. 1)"I've finally worked out an explanation as to why planets orbit the sun and moons orbit planets. It is gravity that keeps an ...
Thursday, September 4, 2008 at 7:14pm by Tyler

science
Most stars we see are on the main sequence. Stars spend most of their lives consuming their initial stock of hydrogen. Is there a connection between these two statements? If so, what is it?
Monday, March 26, 2012 at 12:34pm by long

space
How early south africans incorporated the stars into their world,explaining how they used the stars to mark seasons and events and retelling some legends and stories linked with specific stars and constellations
Sunday, September 6, 2009 at 4:58pm by Anonymous

Science
Dont the stars you see depend on where you are on Earth? After all, you can't see stars during the daylight, nor see them below the horizon.
Monday, February 22, 2010 at 7:23pm by bobpursley

Science
Drew spends one weekend each month at his grandparents farm.He enjoys loking at the stars in the night sky with his grandfathers tetscope. Drew is a careful observer of the stars and he notices that the stars in the night sky are in a different location in the sky each time he...
Wednesday, April 18, 2007 at 5:07pm by Hot stuff

Science
All do not. There have been planets that revolve around other stars. And if you examine it closely, Earth and Moon are revolving a centerofgravity point between the two, and it is this centerofgravity point which is rotating about the sun. So, why? Well Newtons First and ...
Tuesday, April 5, 2011 at 8:24pm by bobpursley

Science-Help
Both comets and planets orbit the sun. How do their orbits differ? Comets orbit elliptically, and planets orbit more circularly. Please correct me if Im wrong, thanks
Monday, February 15, 2010 at 9:38pm by Sara

Science
Both comets and planets orbit the sun. How do their orbits differ? Comets orbit elliptically, and planets orbit more circularly. Please correct me if Im wrong, thanks
Monday, February 15, 2010 at 9:02pm by Sara

Astronomy
Purpose the run somehow becomes a black hole without change in its mass , it will pull into itself a.all the planets b.only mercury c.all the planets from mercury to mars d.none of the planets
Saturday, November 3, 2012 at 8:20pm by Ajai

Science
Most of those 10^22 stars are to far away to be seen. Ou eyes only admit light through pupils with a m illimeters diamater. The human retina is also not very sensitive. Absorption of the light from distant stars (near the center of the galaxy) buy interstellar dust is also ...
Monday, February 22, 2010 at 9:23pm by drwls

physics
In recent years, a number of nearby stars have been found to possess planets. Suppose, the orbital radius of such a planet is found to be 3.0 1011 m, with a period of 980 days. Find the mass of the star.
Thursday, October 4, 2012 at 10:19pm by Garcia

Physics
In recent years, a number of nearby stars have been found to possess planets. Suppose, the orbital radius of such a planet is found to be 3.0 1011 m, with a period of 1000 days. Find the mass of the star.
Friday, June 29, 2012 at 2:30pm by Sierra

Physics
In recent years a number of nearby stars have been found to possess planets. Suppose the orbital radius of such a planet is found to be 5.5 x1011 m, with a period of 1210 days. Find the mass of the star.
Tuesday, September 20, 2011 at 3:29pm by Anon

Physics
In recent years, a number of nearby stars have been found to possess planets. Suppose, the orbital radius of such a planet is found to be 3.3 1011 m, with a period of 1080 days. Find the mass of the star
Friday, February 11, 2011 at 1:11am by Renee

earth
The earth doesn't "float", it orbits the sun following Newton's Law of Universal Gravitation. The presence of the sun, which is much more massive than earth and the other planets, drives the movement of the planets. The sun is so dense that a spoonful of it ...
Wednesday, September 29, 2010 at 9:06am by Lee

science with planets
Only 3 of the 9 planets in our solar system have official "discoverers" and "times of discovery". Uranus was discovered by Sir William Herschel in 1781. Neptune was discovered by John Couch Adams in 1846. Pluto was discovered by astronomer Clyde Tombaugh in...
Tuesday, March 23, 2010 at 4:56pm by Dave

science
if two stars are otherwise identical, the brightness is affect by distance. But a near faint star will not appear as bright as a distant bright star. Some stars just shine more intensely than others.
Tuesday, October 2, 2012 at 2:47pm by Steve

Physics
A space probe is carried by a rocket into outer space where it continues to move on its own in a straight line. What keeps the probe moving? Is the answer: the gravitation forces from diﬀerent stars and planets
Friday, March 1, 2013 at 8:08pm by Sally

science
k .. how are elements formed in stars? i have exam tomorrow ..and i need th annswer!!! THANKS The gas from which they formed had been seeded with the heavy elements formed from previous giant stars. Nucleosynthesis--wikipedia
Sunday, December 10, 2006 at 11:38am by alisa

Science need help
Astronomers believe that the biggest stars in the Galaxy may be a hundred times more massive than the Sun, but are a million times brighter. Would you expect such stars to have longer, shorter or comparable lifetimes to that of the Sun?
Friday, December 21, 2012 at 4:59am by zak

science
which of the statements below is true? a) the stars in a galaxy are held together by gravity b) Stars in a galaxy slowly rotate around a center c) The Milky Way is the only galaxy in the universe d)All of the above just need to know if my answer is correct or wrong d
Monday, August 16, 2010 at 5:04pm by ant

Earth and Space Science
I agree with Shaniqua's order of size. The heads of comets are smaller than planets, but comparable to asteroids. If you include the length of their visible tails, comets are larger than planets. The tails are nothing but dust and gas, however. You only see them when the ...
Saturday, March 23, 2013 at 9:47pm by drwls

Science: Astronomy
Why can't we use solar type stars as spiral tracers? What type of stars make good spiral tracers? Why? What characteristics do they have to perform this function?
Thursday, July 15, 2010 at 6:30pm by Katrell

Universe and Stars
I am not quite sure what you are asking, but it seems to be related to the "parallax" method of measuring star distances. As the earth moves around the sun, we look at stars from different angles, and the "nearby" stars appear to move back and forth by a ...
Thursday, March 4, 2010 at 7:20pm by drwls

Physics
Three identical stars of mass M form an equilateral triangle that rotates around the triangle's center as the stars move in a common circle about that center. The triangle has edge length L. What is the speed of the stars?
Tuesday, January 11, 2011 at 9:06pm by Monique

astronomy
Most stars become white dwarfs that will continue to cool down and emit less light. Only the most massive stars become neutron stars. They are a small minority. They have a mass more than 1.4 times that of our sun. If I remember correctly, stars that become neutron stars lose ...
Saturday, November 28, 2009 at 6:28pm by drwls

physics
A star of mass 2.0 1031 kg that is 4.8 1020 m from the center of a galaxy revolves around that center once every 4.2 108 years. Assuming that this star is essentially at the edge of the galaxy, each of the stars in the galaxy has a mass equal to that of this star, and the ...
Friday, July 16, 2010 at 7:26pm by Sam

science
What is on pulsars and pulsar planets. Using this information, describe what you might encounter on your space mission. Thank you for using the Jiskha Homework Help forum. Rather than my posting an entire page of sites, please go to the following, which I found with a Google ...
Tuesday, May 15, 2007 at 4:26pm by Rahul

physics
Three identical stars of mass M = 6.4 x 1030 kg form an equilateral triangle that rotates around the triangle's center as the stars move in a common circle about that center. The triangle has edge length L = 5.0 x 1010 m. What is the speed of the stars?
Monday, March 28, 2011 at 1:39pm by jr

Science !
What is being measured? Those numbers are too large to be doppler wavelength shifts of stars. Besides, dopper shifts measure speed in one direction only (the line of sight). Stars do not have single wavelengths. That may have a number of shifted spectral lines (emission or ...
Tuesday, March 3, 2009 at 11:41pm by drwls

Physics
It works for all planets. Look up the Period, P, and the (average) Radial distance from the sun, R, for the terrestrial planets Mercury, Venus, Earth and Mars. The average radial distance is also called the semimajor axis. Prove to yourself that P^2/R^3 is the same constant ...
Thursday, February 2, 2012 at 11:48pm by drwls

science
It is true that Jupiter has a lower density than Earth, by about a factor of 5. But its volume is over 1000 times larger. The next largest planet is Saturn. It has a lower density than Jupiter, and is considerably smaller as well. it has about 1/3 the mass of Jupiter. This web...
Tuesday, November 23, 2010 at 12:32am by drwls

Science Question
How might the most common occurring stars be described, based on our stellar neighborhood? A. White Dwarfs B. K giants C. A main sequence D. M main sequence The most common stars are Red Dwarfs. I dont like the answer choices. Most of them are M type stars. To heat up one kg ...
Tuesday, September 19, 2006 at 10:26pm by Liz

physics
mc030-1.jpg Two stars are bound together by gravity. The larger star has four times the mass of the smaller star. Which diagram best illustrates the orbital motion of the two stars? (Note: the stars are shown much larger than they really are compared to the
Sunday, April 7, 2013 at 3:13pm by carmen

science
how is heliocentric(planets and Earth revolve around the sun) connected to science? math? the world? you? and y is it important?
Sunday, April 20, 2008 at 5:04pm by anonymous

physics
suppose that there are 1.9*10^25 stars in the universe. how many moles of stars would this be?
Monday, April 22, 2013 at 1:56am by john

Physics
Two stars are 8 light years from earth (a light year is the distance light travels in one year). The 550 nm light from the two stars can be barely distinguished in the diffraction pattern of 90 cm wide single slit. How far apart are the stars?
Wednesday, May 2, 2012 at 8:24pm by jackmo

Science
Why do gas giants have more moons than the terrestrial planets? The gas giants have more moons than the terrestrial planets because of their great masses which result in stronger gravitational fields. Any other info would be appreciated, please tell me if this is correct, thanks
Tuesday, February 16, 2010 at 6:48pm by Sara

science
what eventually happens to medium mass stars? i know small stars don't die out as quickly as more massive ones, but i'm having a hard time figuring out what happens to the medium mass ones. thank you.
Wednesday, February 18, 2009 at 8:07pm by vanessa

grade nine space
Compare the following objects in the our Solar System in terms of 1. Where they are located and 2. What they are composed of : Sun Terrestrial planets Jovian planets Asteroids Comets Meteroids
Monday, January 17, 2011 at 4:36pm by peyton

Science 4
Most stars probably formed A.alone B.in intergalactic space, then were swept up into the Galaxy C.in clusters in the Galaxy's spiral arms D.from planetary nebulae E.in the galactic Nucleus, then migrated outward later I'd guess roughly C ...but im no scientist. check ...
Tuesday, November 7, 2006 at 9:19pm by Liz

Universe&Stars-Please Check
They are considered to be older because they have little instellar matter and because they rarely form new stars like the other galaxies do. They seem to be more evolved than the spiral galaxies because they actually are thought to form within the clusters. The spiral galaxies...
Monday, March 1, 2010 at 1:08pm by Sara

science
how many planets we have
Thursday, July 7, 2011 at 10:06pm by rangrang

science
I mean planets
Friday, November 14, 2008 at 5:47pm by randy

chemistry
Which statement is the best example of pseudoscience? Mike joined a group that studies phrenology. C.J. joined a group that studies endangered species. Katarina joined a group that studies herbal remedies. Lee joined a group that studies stars and planets
Sunday, February 10, 2013 at 1:29pm by samantha

Science
http://www.enchantedlearning.com/subjects/astronomy/planets/
Monday, June 8, 2009 at 5:15pm by Ms. Sue

3 grade English
Your son is doing very well! :-) In the sentence about the galaxy, he didn't use an action verb. An action verb to use with galaxy could be "has." Our galaxy has many stars. For the last one -- Stars reflect light from the sun. The light from stars travel a long ...
Friday, January 20, 2012 at 5:51pm by Ms. Sue

Corporate Tax
Alan just immigrated to Canada and owns STARS ltd (US company). Alan owned 100% of shares to STARS ltd. STARS ltd. was incorporated in the US in 2004. Alan wanted to know if he should use STARS ltd or a new company to carry on his business in Canada? He's also not sure ...
Sunday, May 18, 2008 at 3:47pm by Rachel

Science 3
There are a lot more M2V stars than M2Ib stars. True False http://en.wikipedia.org/wiki/Stellar_classification
Tuesday, November 21, 2006 at 5:08pm by Liz

Physics help
Two planets, each with a mass of 4.990E+27 kg, are released from rest some 2.850E+11 m apart. What are their speeds (in m/s) as they crash together? Assume that the planets have a diameter of 1.40E+08 m.
Sunday, November 27, 2011 at 1:09am by Anonymous

Science
What are the planets in order?
Monday, June 8, 2009 at 5:15pm by Jackie James

science
what planets are closer to the moon
Monday, April 20, 2009 at 7:37pm by rocks

Astronomy
1. When comparing the sizes of stars, our Sun is: a.) the largest star discovered to date b.)one of the larger stars discovered to date c.)medium size as compared to other stars d.)one of the smallest stars discovered to date My answer: c or d 2. What information can ...
Friday, April 24, 2009 at 2:45am by John

physics
Two stars are 2.4 × 1011 m apart and are equally distant from the earth. A telescope has an objective lens with a diameter of 1.72 m and just detects these stars as separate objects. Assume that light of wavelength 590 nm is being observed. Also, assume that diffraction ...
Tuesday, May 7, 2013 at 7:37pm by Ashley

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