What are stars actually made of? By analyzing the ratio of the lightest elements, astronom...
The unique fingerprints of the elements. When light passes through a gas or is emitted by ...
When a galaxy's core shuts down the birth of new stars. The massive energy pouring out...
Light acting as both a wave and a bullet. Scintillation detectors turn incoming photons in...
Tracing the universe back to its hottest, brightest moments. The light we see today began ...
The engine room of a star. By crushing atoms together to form new elements, stars create t...
The most powerful explosions since the Big Bang. These flashes of energy last only seconds...
You can't reflect an X-ray with a normal mirror. Because these high-energy waves would...
We are literally made of star-stuff. The gold, silver, and iron in our world were forged i...