Sunday
May 1, 2016

Number of results: 55,525

Astronomy
Few question about astronomy: 1.how many centimetres is equivalent to a light-nanosecond 2. How long is an astronomical unit (AU) in light-minutes (1min, i.e., the distance that light travels in a vacuum in one minute)? Please show the calculation if there is any Thanks
September 13, 2011 by KD

astronomy
what good has astronomy produced?
September 5, 2011 by Varia

astronomy
Two stars in a binary system are determined from their position on the H-R diagram and the mass-luminiosity relation to have a combined mass of 8 M. Their orbital period, P, is 1 year. What is their orbital seperation, a? http://en.wikibooks.org/wiki/Astronomy/Mass
April 27, 2007 by Sethi

astronomy
what are the contributions of astronomy?
August 29, 2011 by Varia

astronomy
what is the meaning of astronomy?
August 28, 2011 by Anonymous

Astronomy
April 28, 2009 by John

Astronomy
April 28, 2009 by John

astronomy
August 28, 2011 by Anonymous

science
I have to find out some facts about the dwarf planet vulcan. I have tried wikipedia but it was no help. Can any one please give me some facts or websites that can. This may be what you need. http://www.space.com/scienceastronomy/astronomy/epsilon_vulcan_000804.html
February 9, 2007 by liza

Astronomy 1010
What are six regions of the electromagnetic spectrum? please detail and answer
January 17, 2012 by Frank

Astronomy 1010
Do all wavelength of light make it through the atmosphere? Explain. please detail help and answer
January 17, 2012 by Frank

Astronomy
so i know that theres something Astronomically wrong with this quote but cannot figure out exactly what, would appreciate some help!!! "There's a full moon rising just about midnight, theres a high tide comin' 'round just about dawn" PLEASE, PLEASE, PLEASE, HELP ME!!!
November 6, 2008 by Mike

Astronomy
Why is most of the mass of the solary system contained in the Sun? Briefly describe the protoplanet theory of planet formation. Please help. thanks.
April 30, 2009 by John

Astronomy 1010
Which of the following are related to one another, and which is independent of the others? (Amplitude, Frequency, Period, Wavelength). Please detail help and answer..
January 17, 2012 by Frank

Astronomy
The luminosity of the Sun is 4*10^33 erg/s, and its radius is 7*10^10 cm. What is the Sun's effective temperature? Please enter your answer in units of Kelvin.
May 6, 2014 by qwerty

Astronomy/Physics
I cannot calculate the gravitational force between these two objects. I am confused. Jupiter (R=800 million km, M = 2 x 10 to the 27th power kg and a 100 kg person on earth. Please help!
October 12, 2011 by Tina

Astronomy
On the Autumnal Equinox, you see the Moon in the Waxing Crescent Phase at an angle of 45 degrees above the western horizon. What is the approximate local time? Can someone please explain how to obtain the answer? Thank you!
December 8, 2013 by Maria

Science- Astronomy
Suppose we find a planet in another solar system that has an earth like atmosphere with plentiful oxygen but no life of any kind. Question= Is this discovery considered reasonable or surprising can you please explain? Thank you
October 22, 2014 by Junior

Social studies
Mayan priests interest in astronomy led to the creation of ____. A. a 365-day calendar B. A book of rules C. Human sacrifices D. Cave paintings Which one is correct ? Please help
August 25, 2015 by Alex

STILL HAVE NOT GOTTEN AN ANSWER FOR THIS!! If the Hubble parameter is found to be smaller than we think it is, how would this change the measured age of the universe? justify your answer
December 5, 2011 by Amy

Astronomy
Need some help with Astronomy. I need to figure out the acceleration of gravity on the surface of certain planets. For example, I need to find the acceleration of gravity on Mars when the mass is .11 times the mass of Earth and the radius is .53 times the radius of Earth. ...
October 26, 2008 by TAG

Astronomy 1010
How is red light different blue light? ( Besides the obvious answer of ˇ°their colorˇ±ˇ¦) please a detail help and answer
January 17, 2012 by Frank

Astronomy 1010
How is red light different blue light? ( Besides the obvious answer of ˇ°their colorˇ±ˇ¦) please detail help and answer
January 17, 2012 by Frank

astronomy
Even though I do not believe the Big Bang is what created the universe(although what people clam the bing bang was would have been similar to what happened when God said "Let there be light" I still have astronomy hw. haha. I am having trouble with this question. The big bang ...
April 5, 2015 by sara

astronomy & space
What is the redshift of a galaxy which lies at a distance of 50 mpc, asssuming that the hubble constant is H_0 = 67 km s^-1 Mpc^-1? assume that the speed of light is c=3.0x10^5 Km s^-1 please answer to an accuracy of 2 sig figs. Thankyou.
May 5, 2009 by mathew -b

Using Hubble's law, determine the recessional velocity of a galaxy 700 Mly away. Use 22 km/s/Mly for the Hubble's parameter. Show your work for full credit
December 5, 2011 by Rebecca

Astronomy 1010
You have two objects that are the same size, but one is significantly hotter than the other.How are the spectra of two objects different from one another? please detail help and answer..
January 17, 2012 by Frank

astronomy
In space, the angular resolution of the Keck telescope is govererned by the diffraction limit. How far away could you read the same book, using the Keck telescope in space? Please express your answers in units of meters.
October 25, 2015 by Titos

astronomy
Why is the sky blue?
January 21, 2008 by Belinda

Astronomy
What is the radius of the sun?
December 3, 2012 by jane

Astronomy
The saros cycle
June 11, 2013 by Terrance

Astronomy
What is the phenomenon of differentiation and how does it occurs
November 5, 2008 by Mike

Astronomy
Why are there different types of galaxies?
July 20, 2010 by Magesh

astronomy
How long is the precession cycle?
August 29, 2010 by Anonymous

Astronomy
What type of spectrum is sunlight?
February 18, 2014 by Barbara

Astronomy
The precession of the Earth its causes, and its ramifications
March 27, 2010 by b

astronomy
What does supernova produce, helium or carbon?
April 29, 2010 by Anonymous

astronomy
What does supernova produce, helium or carbon?
April 29, 2010 by Anonymous

Astronomy
What is the Lorentz factor for a spaceship traveling at 0.5c?
March 4, 2012 by Linda

Astronomy
what are the largest stars in the HR diagram called?
March 13, 2012 by Hannah

astronomy
big bang theory define
July 15, 2012 by Luis

Astronomy
How to find the orbital radius of a planet?
December 12, 2012 by Jola

astronomy
which of the statment about CMB are true?
October 7, 2013 by Bela

Astronomy HELP
when does a full moon rise and set?
January 7, 2014 by Mary Ann

Astronomy
F = GM1M2/R2 = (6.67x10-11 x 1.9891x1030 x 25) / (3000)2 =
March 6, 2016 by Anne

astronomy
A geosynchronous satellite is a satellite whose orbital period matches the rotation of the Earth. Calculate the height above the surface of the Earth which a satellite must have in order to be in a geosynchronous orbit. (Please enter your answer in units of kilometers)
October 18, 2015 by Anonymous

astronomy
A geosynchronous satellite is a satellite whose orbital period matches the rotation of the Earth. Calculate the height above the surface of the Earth which a satellite must have in order to be in a geosynchronous orbit. (Please enter your answer in units of kilometers)
October 24, 2015 by Tsambikos

A planet is growing by accretion of material from the solar nebula. Suppose that as it grows, its density remains constant. Does the force of gravity at its surface increase, decrease, or stay the same? Why? Also, What would happen to the surface gravity as the radius of the ...
December 13, 2007 by Liz

astronomy
The luminosity of the Sun is 4*10^33 erg/s, and its radius is 7*10^10 cm. What is the flux of sunlight on the Earth? i answer flux = luminosity/4pi*d^2 = 4*10^33/4pi*49*10^20=.....0,0064994151*10^13=6.49*10^10 erg/cm^2/sec thank you .please help me...
October 24, 2015 by Tsambikos

astronomy
why does Venus have such a high Albedo
November 6, 2008 by Mike

astronomy
on which planets would you weih more than on the earth?
April 11, 2009 by joe

Astronomy
Venus orbits 0.72 AU from the sun. What is that distance in kilometers?
September 6, 2010 by Meliset

Astronomy
Venus orbits 0.72 AU from the sun. What is that distance in kilometers?
September 7, 2010 by Meliset

Astronomy
Explain what occurs during tidal friction?
October 3, 2011 by Rebecca

Astronomy
How many degrees of longitude does the Sun move in each hour?
November 2, 2011 by James

ASTRONOMY
Compare Einstein and Newton's pictures of gravity.
December 19, 2011 by Kate

AStrONomY
What contributions of Uranus were made by the Voyager 2 program?
February 27, 2012 by CHEYANNE

Astronomy
The frequency of a radio transmitter is 90 megahertz. What is its wavelength?
March 4, 2012 by Linda

Astronomy
Why is it possible to see Mercury at 6:45 pm on February 5, 2014?
February 16, 2014 by Carol

Astronomy
How far will Venus be from Earth on February 19, 2014?
February 17, 2014 by Carol

astronomy
If the planet is in an edge-on orbit, what would its mass be (in kg)?
June 25, 2014 by keitanako

astronomy
Which of the following two telescopes has a better angular resolution? 1) the Hubble Space Telescope (2.4 meter aperture) at optical wavelengths and 2) the Very Long Baseline Array (VLBA), a radio interferometer with a maximum baseline of 8600 km observing at 1 mm wavelengths...
October 6, 2015 by Tsambikos

astronomy
Which of the following two telescopes has a better angular resolution? 1) the Hubble Space Telescope (2.4 meter aperture) at optical wavelengths and 2) the Very Long Baseline Array (VLBA), a radio interferometer with a maximum baseline of 8600 km observing at 1 mm wavelengths...
October 18, 2015 by Anonymous

astronomy
Which of the following two telescopes has a better angular resolution? 1) the Hubble Space Telescope (2.4 meter aperture) at optical wavelengths and 2) the Very Long Baseline Array (VLBA), a radio interferometer with a maximum baseline of 8600 km observing at 1 mm wavelengths...
October 24, 2015 by Tsambikos

Astronomy
Describe in one sentence the rotations and revolutions of the planets.
November 23, 2007 by Liz

Astronomy
If the elipse were a planet's orbit where would the sun be on the page?
April 11, 2009 by joe

astronomy
on which planets would you weigh nearly the same as on earth?
April 11, 2009 by joe

astronomy
How are cepheid and rr lyrae variables used in determining distances?
January 8, 2010 by Taylor

astronomy
Explain the cause of the Earths' season. I need a diagram for my explanation
March 27, 2010 by b

U of M astronomy
if a planet has a period of 1 century, what is its average distance from the Sun in AU?
February 14, 2011 by pam

astronomy
What is the electromagnetic flux coming from the surface of a 5000K blackbody?
March 19, 2011 by james

astronomy
Why the Universe ,as we know it,made of matter,with no antimatter,and what is the role of neutrino? Thanks
October 7, 2013 by Mia

Astronomy
Why is it possible to see the planet Mercury at 6:45 pm on February 5, 2014.
February 15, 2014 by Rashida

Astronomy
What five object were found in the sky on February 5, 2014 at 9 pm.
February 15, 2014 by Ann

Astronomy
Why is the portion of Venus opposite the direction of the Sun not apparent.
February 16, 2014 by Barbara

Astronomy
Why is the portion of the Moon opposite the direction of the Sun not apparent?
February 16, 2014 by Barbara

Astronomy
How do astronomers know whether they are seeing planets or stars when they are distant?
November 24, 2014 by Ben

Phyics - Astronomy
You are standing at a latitude of 35 degrees South. Star x is currently at an azimuth of 45 degrees and an altitude of 50 degrees. What is the azimuth and altitude coordinates of Star X 3 hours later? I don't know how to do this. If anyone knows how to calculate this please ...
September 11, 2011 by Amanda

Astronomy
How did the voyager mission change our preconception of Jupiter and its moons
November 9, 2007 by Liz

astronomy
why is it necessary for ultrviolet telescopes to be placed on a space-based platform? thanks
March 3, 2008 by amy21

Astronomy
What are two pieces of evidence that the earth is a highly differentiated body
November 5, 2008 by Mike

Math/Science/Astronomy
What is the formula to calculate the illumination fraction of the Moon?
December 24, 2008 by Anonymous

Astronomy
Does the = sign in the equation E=mc2 mean that energy and light are equivalent
March 27, 2010 by b

Astronomy
Do people wear seatbelts to protect themselves from speed or acceleration?
September 14, 2010 by Dre

chemistry
Which of the following is not an example of a science? geology astronomy astrology ecology
February 10, 2013 by sabrina

chemistry
Which of the following is not an example of a science? geology astronomy astrology ecology
February 10, 2013 by raven

Astronomy
If I was born on August 12, 1953 what is the constellation of my Astrological"Sun Sign".
February 13, 2014 by Barbara

Astronomy
What is my Astrological "Sun Sign" and how was it determine if I was born on August 12, 1953.
February 13, 2014 by Barbara

ASTRONOMY
Good evening all, I am working on a PowerPoint presentation for my Astronomy class about planet Earth - my question is: What is Earth's brightest apparent magnitude (if it has one)? I have searched every reliable source I know of (and that I come across), but I cannot seem to ...
November 7, 2014 by Andy G

Astronomy
Why is the time at which leo transits the meridian different for mexico city and chicago?
January 28, 2009 by Melissa

Astronomy
Is the ellipse more circular when the tacks are closer together or farther apart?
April 10, 2009 by joe

Astronomy
Is the elipse more circular when the tacks are closer together or farther apart?
April 11, 2009 by joe

Astronomy
How do observations of he sun's surface tell us about conditions in the solar interior?
November 15, 2009 by Taylor

College astronomy
What would be the parallax of Alpha Centauri if measurements were made from Mars?
March 2, 2011 by Lisagail

english
Christina and Christopher worked together and completed a project about astronomy.
January 26, 2011 by Anonymous

lang
A science that looks at atmosphere and the weather. A. Chemistry B. Meteorology C. Geology D. Astronomy d
February 18, 2012 by kesha

Opinion
Which class would be better(easier) to take Earth Science or Astronomy?
March 21, 2012 by Marie

Astronomy
If the cosmic microwave background radiation (CMBR) is at a temperature of 2.7K, what is its peak wavelength?
April 23, 2012 by Leila

Astronomy
If the cosmic microwave background radiation (CMBR) is at a temperature of 2.7K, what is its peak wavelength?
April 23, 2012 by Leila

astronomy
What phase is the Moon if it is visible in the sky at midnight, but not exactly, opposite the Sun?
July 15, 2012 by Gerson

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