The feature may be a ‘skylight’ in an underground lava tube.

The stars that are just right to support life-bearing planets might be dimmer and longer-lived than the sun.

Newly recorded gamma rays from a microquasar may reveal how the black holes or neutron stars powering them can accelerate particles to enormous energies.

Plume of lunar material contained roughly 25 gallons of vapor and ice.

The amount of lithium in the atmosphere of sunlike stars is a powerful indicator of whether such stars have planets, a new study reveals.

Combining infrared and X-ray images from three orbiting observatories, NASA has unveiled a never-before-seen composite portrait of the Milky Way’s bustling center.

Ulf Leonhardt is riding high these days, with a new award from the Royal Society of Great Britain to further develop his ideas on how to make things in plain sight disappear. Born in East Germany and now occupying the theoretical physics chair at Scotland’s University of St. Andrews, Leonhardt is among the leaders of the worldwide race to realize an old dream of science fiction: cloaking devices. They would steer light or other electromagnetic waves around them like water around a stone in a smooth stream, leaving nary a ripple of difference in the flow. Such things, letting light swish ... (p. 18)

The signature of positrons has been found for the first time in gamma rays associated with storms on Earth. (p. 9)

Gamma-ray emissions are providing a guide to finding the compact, rapidly rotating remnants of massive stars known as pulsars.

The largest known galactic congregation is bigger than astronomers thought—and its inhabitants are all dead or dying. (p. 9)

Volcanic activity is more recent than expected, MESSENGER shows on its third flyby of the planet. Also, surface iron occurs as oxides.

A new technique to make shuttle launches safer combines tricks from particle colliders, moon landings and vulture tracking.

By detecting gamma rays, a new generation of telescopes bolsters theory that supernovas are origin of some cosmic rays (p. 8)