Professional Astronomical Refractor Telescope: If you are interested in ... for adults high powered is equipped with two eyepieces(10 mm and 25 mm) and a 3X Barlow lens. The 3X Barlow lens triples ...

It Will Be Much, Much Slower The Keck Observatory's two telescopes are nothing short of engineering marvels, each featuring a 32-foot-wide (10-meter) primary mirror comprising 36 precisely aligned ...

The dwarf irregular galaxy NGC 4214 resides about 10 million light-years away. Approximately 10,000 galaxies fill a small ... is two and a half times the size of our Milky Way and has nine rings — six ...

Another Newtonian reflector, this telescope is currently discounted by ... one of these models then make sure you pick one that has mirrors with a protective coating, as it will last longer.

Explore the night sky with the best telescopes to suit every budget and experience level, perfect for observing February's Snow Moon and spectacular planetary parade. February is a great time to ...

NASA boasts that in the Clean Room you could put nearly 30 tractor-trailers side by side on the floor and stack them 10 ... of the telescope is an exquisitely polished, concave primary mirror ...

This NASA/ESA Hubble Space Telescope image of the Westerlund 2 cluster marks Hubble's 25th year in orbit, celebrating 25 years of discoveries, stunning images, and groundbreaking science. The Hubble ...

THE present volume, which is to a great extent a reprint, is designed for the help and instruction of those who, possessing a small telescope, are at a loss as to how best to use it. On the whole ...

Refractor telescopes use specialised lenses to gather and focus light into an image, displaying a magnified sky view. In contrast, reflector telescopes use curved mirrors to reflect light onto the ...

Scientific American is part of Springer Nature, which owns or has commercial relations with thousands of scientific publications (many of them can be found at www ...