Magazine | Page 209 of 282 | Astronomy.com

After the Andromeda and Milky Way galaxies finish merging in a few billion years, what will happen to the other galaxies in the Local Group?

Exoplanets, Science

Bob Berman’s Strange Universe: Alien winds

Message from Mercury

Robotic Spaceflight

What bodies beyond Pluto will the New Horizons probe investigate?

What would we see if the solar system were located in a dark nebula like the Coal Sack? Would things look much different from inside a bright nebula such as the Orion?

Saturn returns to glory

Inside Saturn’s erupting moon

Ask Astro web extra: What is the difference between a nova and a supernova?

More galaxy groups to observe

What was the most powerful supernova blast ever seen?

Stephen James O’Meara’s Secret Sky: Serpents of the air

I’ve read about stellar explosions propagating at “supersonic speed.” On Earth, supersonic means faster than the speed of sound. How does this idea apply to stars?