Cosmology

As observations fail to pin down the so-far undetectable stuff, explanations once considered fringe are now getting another look

Moons orbiting distant planets might be visible in existing spacecraft data

The ancient cosmology could explain the apparent motion of the planets using just their movements around circles

NASA's long-term vision, released by the agency's astrophysics division, restates its broad and popular themes for scientists to pursue including "Are We Alone?" and "How Did We Get Here?"

A new video simulation helps viewers experience the moments when the image was captured and what it was like inside the spacecraft at the time

The existence of the Higgs boson particle was confirmed, a strong case for human-caused climate change was released and scientists analyzed the oldest-known human DNA

A 10-dimensional theory of gravity makes the same predictions as standard quantum physics in fewer dimensions

If different wavelengths of light experience spacetime differently, the big bang may never have happened

Stars racing out of the galaxy could offer clues about dark matter

Physicists line up to crack a long-standing particle puzzle

The images show startling detail of the increasingly bright ISON on November 14, when the comet entered full outburst mode

A newly analyzed Kuiper Belt object is posing a challenge to planet-formation theories