Astronomers want increasingly large telescopes to peer into the depths of space. To build a solid telescope mirror nearly 30 feet across, you need an oven that heats to 2,100 degrees Fahrenheit ...

Imagine a space telescope with a mirror stretching 50 meters across! That's larger than the width of a U.K. soccer field and ...

How to make a homemade telescope Instead of paper towel rolls, use corrugated paper as the base. Place the larger lens 1.5 inches from the top of the paper and wrap it around the lens so the edges ...

How to make a homemade telescope Instead of paper towel rolls, use corrugated paper as the base. Place the larger lens 1.5 inches from the top of the paper and wrap it around the lens so the edges ...

Premium telescope mirrors are painstakingly handcrafted. The process involves grinding, polishing, and precise figuring to achieve a parabolic curve.

Casting the Giant Magellan Telescope’s primary mirrors — each nearly 8.5 meters wide — has been ongoing for roughly 18 years. Starting with a glass-loaded furnace, ...

How to build a telescope If you’re someone who spends their evenings watching the night sky and trying to get a glimpse of meteor showers or constellations, a telescope is a must. What can be ...

How to build a telescope If you’re someone who spends their evenings watching the night sky and trying to get a glimpse of meteor showers or constellations, a telescope is a must. What can be ...

How to build a telescope If you’re someone who spends their evenings watching the night sky and trying to get a glimpse of meteor showers or constellations, a telescope is a must. What can be ...

A homemade binocular telescope, an HTC One, and 700 hours of work went into taking a single, spectacular moon shot. The photographer shares his secrets.

The Giant Magellan Telescope is easily the most ambitious terrestrial astronomy program humanity's ever devised. It has—quite literally—been built from ...