Astronomers have observed the rocky exoplanet BD+05 4868 Ab disintegrating as it orbits near its host star. The planet, now ...

Known as SDSS J115331 and LEDA 2073461, these two overlapping spiral galaxies lie over a billion light-years from Earth and were captured in a photograph by the NASA/ESA Hubble Space Telescope.

Samples drilled by the Curiosity rover on Mars have revealed abundant signs of a carbon cycle that remained hidden from ...