Some astronomical objects emit no visible light but are known through (blank?) and radio images; satellite observations (blank?) Earth's atmosphere help scientists study space at wavelengths that do not reach Earth's surface?
Some astronomical objects emit no visible light but are known through (blank?) and radio images; satellite observations (blank?) Earth's atmosphere help scientists study space at wavelengths that do not reach Earth's surface?
To answer this question, we need to understand the two blanks in the statement. The first blank refers to the type of images or observations that allow us to detect astronomical objects that do not emit visible light. The second blank refers to satellite observations that help scientists overcome the limitation of Earth's atmosphere in studying space.
The first blank is filled by "X-ray" and the second blank is filled by "above".
Explanation:
1. X-ray: To detect astronomical objects that do not emit visible light, scientists use instruments that can capture X-rays. X-ray telescopes are designed to observe high-energy phenomena such as black holes, neutron stars, and active galactic nuclei, which emit X-rays. These telescopes employ mirrors and detectors optimized for capturing X-rays.
2. Above: Earth's atmosphere interacts with various wavelengths of electromagnetic radiation, including X-rays and certain radio wavelengths. X-rays are absorbed and scattered by the atmosphere, which makes it challenging to observe celestial objects emitting X-rays from the surface of the Earth. Therefore, to study X-ray emissions and other wavelengths that do not reach the Earth's surface, scientists use satellites positioned above the Earth's atmosphere. Satellites in space can capture and transmit data without interference from the atmosphere, enabling scientists to study astronomical objects at various wavelengths that are otherwise inaccessible from the Earth's surface.