The Webb Space Telescope will need to be extraordinarily cold in order to see the infrared light from the farthest reaches of the universe. Webb’s enormous sunshield will protect the telescope’s instruments from the Sun’s energy.... Read More

The making of the Webb Space Telescope’s mirrors is a complex process. Each surface must be precisely shaped to capture and direct the maximum amount of light to the telescope’s detectors. The mirrors must be ground and polished to a smooth curve that keeps light from bouncing off in unwanted directions. Join us at Tinsley Laboratories in Richmond, Calif., where engineers are bringing Webb’s mirrors to their exact requirements.... Read More

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Backyard stargazers get a monthly guide to the northern hemisphere’s skywatching events with “Tonight’s Sky.” In March, the constellations of spring appear, heralding the change in seasons. Look for Gemini and Cancer as they dominate the night sky. “Tonight’s Sky” is produced by HubbleSite.org, online home of the Hubble Space Telescope. This is a recurring show, and you can find more episodes — and other astronomy videos — at HubbleSite.org.... Read More

Hubble images are made, not born. Images must be woven together from the incoming data from the cameras, cleaned up and given colors that bring out features that eyes would otherwise miss. In this video from HubbleSite.org, online home of the Hubble Space Telescope, a Hubble-imaged galaxy comes together on the screen at super-fast speed.... Read More

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Take a look at some of the most distant galaxies Hubble has ever seen, and find out why, when we look at the most distant objects in the universe, we are also seeing the cosmos’ earliest objects.... Read More

Backyard stargazers get a monthly guide to the northern hemisphere’s skywatching events with “Tonight’s Sky.” In February, Orion strides across the cosmos, a famed nebula at his belt, and Saturn is visible before midnight. “Tonight’s Sky” is produced by HubbleSite.org, online home of the Hubble Space Telescope. This is a recurring show, and you can find more episodes — and other astronomy videos — at HubbleSite.org.... Read More