Astronomy Staff, Author at Astronomy.com | Page 3 of 276

NGC 253 in Sculptor

Astronomy for beginners, Observing

What are NGC objects, and where did this catalog come from?

Telescopes and Equipment

Fall into new astronomy products this month

How is TESS able to spot more planets in the sky than Kepler could?

three spectra

How does spectroscopy work?

Observing, Observing Basics

Why aren’t the constellations always drawn the same way?

Telescopes and Equipment

Find cool products this hot month

V838 Monocerotis

What is a light echo?

Orion Nebula

Observing, Observing Basics

How do light pollution filters work?

Thor’s Helmet, NGC 2359

Astrophotography, Science

What are the most beautiful images in astronomy?

LHC at CERN

Is there a hottest temperature possible in the universe?

Neutron stars are incredibly dense objects about 10 miles (16 km) across. Only their immense gravity keeps the matter inside from exploding; if you brought a spoonful of neutron star to Earth, the lack of gravity would cause it to expand rapidly.

Exotic Objects, Science

What would happen if a tablespoonful of a neutron star was brought to Earth?

galaxy cluster Abell 2744 as seen by JWST and the Chandra X-ray Observatory

Cosmology, Exotic Objects

Astronomers say they’ve spotted the oldest, most distant black hole. How do they know this?