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A telescope is a tool that astronomers use to see faraway objects. Most telescopes, and all large telescopes, work by using curved mirrors to gather and focus light from the night sky. The first telescopes focused light by using pieces of curved, clear glass, called lenses.
The telescope will be able to capture images of some of the first galaxies ever formed. It will also be able to observe objects in our solar system from Mars outward, look inside dust clouds to see where new stars and planets are forming and examine the atmospheres of planets orbiting other stars.
The telescope has played a key role in the discovery of dark energy, a mysterious force that causes the universe to expand faster and faster as time goes on. And it has revealed details of gamma-ray bursts -- powerful explosions of energy that occur when massive stars collapse.
Satellites also can see into space better than telescopes at Earth's surface! That's because satellites fly above the clouds, dust, and molecules in the atmosphere that can block the view from the ground.
Watch this video to learn all about the Deep Space Network, NASA’s giant radio antennas used to talk with spacecraft at the Moon and beyond.
Exoplanets are very hard to see directly with telescopes. They are hidden by the bright glare of the stars they orbit. So, astronomers use other ways to detect and study these distant planets. They search for exoplanets by looking at the effects these planets have on the stars they orbit.
How Do Telescopes Work? Telescopes use mirrors and lenses to help us see faraway objects. And mirrors tend to work better than lenses! Learn all about it here. Thirsty? Have a comet! Could they have brought the water to our planet? explore; Explore the Electromagnetic Spectrum. The windows show the Universe in all its colors. explore
Telescopes use light to see things. Imaging radar uses a different kind of light, but at a much longer, lazier wavelength that our eyes do not see. That is why radar can penetrate clouds.
The Amazing Hubble Telescope. The Hubble Space Telescope is a large space telescope orbiting Earth. explore; What Is the James Webb Space Telescope? The James Webb Space Telescope is the largest, most powerful space telescope ever built. explore; How Do Telescopes Work? Telescopes use mirrors and lenses to help us see faraway objects.
Astronomers use very powerful telescopes to take pictures of faraway nebulae. Space telescopes such as NASA's Spitzer Space Telescope and Hubble Space Telescope have captured many images of faraway nebulae.