sun
Will The Sun Explode?
All stars die, some more violently than others. Once our own Sun has consumed all the hydrogen fuel in its…
Astronomy Cast Ep. 325: Cold Fusion
The Universe is filled with hot fusion, in the cores of stars. And scientists have even been able to replicate…
Why Does the Moon Shine?
We enjoy the light from the Sun during the day, and then the comforting glow of the Moon at night.…
How Far is Mars from Earth?
This article was originally published on Aug 10, 2012. We've updated it and added this cool new video! Sending spacecraft…
Astronomy Cast 324: Sun Grazers
Comets can spend billions of years out in the Oort Cloud, and then a few brief moments of terror orbiting…
How Does a Star Form?
We owe our entire existence to the Sun. Well, it and the other stars that came before. As they died,…
NASA’s STEREO Spacecraft Spots Comets ISON and Encke
As comets ISON and Encke continue toward their respective rendezvous with the Sun, they have now both been captured on…
Astronomy Cast 322: SOHO
As we've mentioned before, the Sun is a terrifying ball of plasma. It's a good thing we're keeping an eye…
Astronomy Cast 321: Solar Flares
Sometimes the Sun is quiet, and other times the Sun gets downright unruly. During the peak of its 11-year cycle,…
Solar Activity Ramps Up as Giant Sunspot Group Turns to Face Earth
The Sun is finally acting like it’s in solar maximum. Our Sun has emitted dozens of solar flares in since…