Scientists have detected an unusual gamma-ray halo around our Milky Way galaxy. This signal, observed by NASA's Fermi ...

Astronomers have performed very long baseline interferometry (VLBI) observations of a gamma-ray loud blazar known as TXS ...

Extraordinary claims require extraordinary evidence,” Carl Sagan once said-a caution that resonates sharply with a ...

Physicists have demonstrated with unprecedented accuracy that the speed of light remains constant. In 1887, a landmark physics experiment was carried out by American researchers Michelson and Morley.

NASA is teaming with Katalyst Space Technologies to rescue the Swift Observatory, whose orbit is decaying toward reentry by ...

NASA’s Fermi Gamma-ray Space Telescope may have detected the first direct evidence for dark matter, according to new research ...