Magazine | Page 12 of 283 | Astronomy.com

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?

E: Time’s Telescope was an almanac published in London from 1814 to 1834.

The history of astronomical almanacs

Hubble image of variable star RS Puppis

How do Cepheid variables indicate distance?

20 things to see on the Moon: An observer’s guide to lunar names

The summer Milky Way was photographed from a hilltop over the Modoc Plateau in California using ten 3-minute exposures and a Sigma Art 14mm lens. All photos were taken with a Nikon D750 DSLR, pre-processed in Adobe Bridge, and post-processed in Adobe Photoshop.

Astrophotography

How to take your own wide-field sky images

Exotic Objects, Solar System

What are the chances of dark matter or a black hole ripping apart Earth?

The Moon rises over mountains in Utah. Credit: NASA/Bill Dunford.

Science, The Moon

Why does the Moon look so large sometimes as it rises on the horizon?

Telescopes and Equipment

See the hottest astronomy products of July

The bright skyglow from city lights can easily wash away the night sky, hiding the stars from view. But they are still there, shining — and we can reveal them with collaborations and initiatives underway around the world.

The fight against light pollution

Mars and Comet C/2022 E3 (ZTF) in Taurus

July 2024: What’s in the sky this month?