Astronomy

Astronomy

A still mysterious solar system

Whether or not a Planet X exists, the puzzle, like a good mystery, delights the mind. But better than any novel, the puzzle’s solution has the potential to reveal something new and unexpected about our solar system.

Astronomy

Philae lander reveals stunning, unsettling view of comet

Concerns are surfacing about the Rosetta mission lander Philae’s ability to fully explore comet 67P/Churyumov-Gerasimenko.

Astronomy

Philae lander image raises questions about probe’s health

Early reports suggest that Rosetta's lander Philae bounced twice when landing on comet 67P/Churyumov-Gerasimenko.

Astronomy

Rosetta mission lander set to explore surface of comet

The Rosetta spacecraft’s minifridge-sized lander Philae is now on comet 67P/Churyumov-Gerasimenko and is beginning to study its geology and chemistry.

Planetary Science

Philae lander touches down on comet 67P

Rosetta’s lander Philae has reached the surface of comet 67P/Churyumov-Gerasimenko and is starting to do science.

Astronomy

Philae lander is in free fall toward comet 67P

The Rosetta spacecraft has nudged its lander Philae off its back toward the surface of comet 67P/Churyumov-Gerasimenko.

Astronomy

Rosetta’s countdown to comet landing has begun

Everything is on track for Rosetta mission scientists to attempt to set the Philae lander on the surface of comet 67P/Churyumov-Gerasimenko.

Planetary Science

Rosetta prepares to let go of its comet lander

To date, everything is a go for scientists to attempt to land a robotic probe on a comet.

Planetary Science

Comet delivered a showy meteor shower — on Mars

Comet Siding Spring dumped several tons of material into the Martian atmosphere that could have damaged NASA spacecraft.

Astronomy

Infant worlds carve gaps in planet-forming disk

A new image shows planets sweeping up gas and dust in a disk encircling the infant star HL Tau.

Astronomy

Nearly starless galaxies found in nearby cluster

Astronomers have found 47 galaxies with relatively few stars, something not predicted by any galaxy formation theories.

Cosmology

Gamma rays offer mixed messages on identity of dark matter

Conflicting results from Fermi telescope puzzle astronomers about dark matter’s true identity.