Early risers will get a rare opportunity to see something extraordinary in the early hours of July 18 — the dark shadow of Saturn's largest moon, Titan, sweeping across the planet's cloud tops.

The so-called "Extremely Large Telescope" is being built on a mountaintop in the Andes at an elevation of about 3,000 meters. And it really is extremely large.

NASA launching SPHEREx and PUNCH missions this weekend A NASA space telescope on a mission to map millions of galaxies has turned on its detectors for the first time, capturing images of tens of ...

Hubble Space Telescope's 35th anniversary: See NASA's new out-of-this-world images The Hubble Space Telescope, launched 35 years ago, has blown our minds with its striking images of far-away ...

The Sombrero galaxy looks entirely different in a new image by the James Webb Space Telescope. Instead of a Mexican hat, it appears more like an archery target.

The most powerful solar telescope in the world has recorded a major milestone atop an active volcano in Hawaii, capturing a detailed image of a cluster of sunspots with the telescope's new Visible ...

The night sky is beautiful enough to look at with the unaided eye, but add a telescope atop a telescope mount, and you’ll have a true sight to behold. And, as important as it is to get one of ...

NASA is shifting the way the Hubble Space Telescope points. The change is a work-around for a piece of hardware that's become intolerably glitchy. Officials say Hubble will continue to do 'ground ...

Jupiter's dazzling auroras are hundreds of times brighter than those seen on Earth, new images from the James Webb Space Telescope reveal. The solar system's largest planet displays striking ...

A 2.4-inch refracting telescope, for example, should never use more than 120-power magnification (the general rule of thumb is 50-power per inch of aperture).

The Daniel K. Inouye Solar Telescope captured the sharpest-ever images of the sun’s surface, revealing ultra-fine bright and dark stripes called striations that are caused by powerful magnetic ...