Aeff is the effective collecting area of the telescope, σ is the instrumental or atmospheric seeing or the pixel-size, whichever dominates, tE is the exposure time, and tD is the dead time. In this ...

But if you have your heart set on purchasing a telescope, here are a few good tips to follow: Go to your local bookstore or ...

Venus, Mars, Jupiter and Saturn parade through our skies this January. The best telescopes for seeing planets can help you spot them! This January there are plenty of planetary events to observe ...

Christmas is a great time to look for a telescope for your budding amateur astronomer. But there are some things to keep in ...

(For more on the controversy Galileo spawned, see His Big Mistake.) Building a better refractor The spyglass-turned-telescope had limitations, some of which Galileo was able to design around.

Orbital telescopes function as eyes in the sky that allow astronomers to peer farther into the universe and see the cosmos more clearly. Scientists began dreaming of such a telescope in the 1940s ...

If the James Webb telescope was 10 times more powerful, could we see the beginning of time? - Sam H., age 12, Prosper, Texas ...

Because planets always appear in a line, the alignment isn't anything out of the norm. What's less common is seeing so many ...

This effect is called ... Even with the most powerful space telescope ever constructed and with a powerful cosmic phenomenon, these galaxies were still too faint to see in enough detail to ...

The initial findings offer novel perspectives on the relationship between star formation and the evolution of galaxies.