My telescope, set up for astrophotography in my light-polluted San Diego backyard, was pointed at a galaxy unfathomably far from Earth. My wife, Cristina, walked up just as the first space photo ...

Light is the fastest phenomenon in the universe, clocking in at just under 300,000 kilometers per second. The telescopes that observe that light, from radio waves to gamma rays, are built at rather ...

Reflections cast by a growing number of satellites orbiting the Earth could ruin more than 95% of images taken by some space telescopes in the next decade, according to a NASA-led study. The reflected ...