but if you can see a lighthouse a billion miles away, you know it must be much more powerful than any you've seen before. Similarly, for gamma-ray bursts to come from billions of light years away ...

Heads up, stargazers! The Gamma Normids (γ-Normid) meteor shower will be observable over Philippine skies from February 25 to March 28, according to state weather bureau PAGASA. PAGASA said the ...