Colors of life on exoplanets

Scientists measure chemical fingerprints for 137 different microorganism species. They hope astronomers will use the colors to recognize life on distant planets.

Possible rings around minor planet Chiron

Chiron is the second minor planet and the second centaur - orbiting beyond Jupiter in the outer solar system - suspected to have a ring system.

Angara rocket key to Russia’s launch future

With development stalled many times over 20 years, successful Angara test flights have buoyed Russian hopes to compete in the space launch industry.

Underground ocean on Jupiter’s largest moon

An ocean below the surface of Jupiter's large moon Ganymede has more water than all earthly oceans, according to evidence from the Hubble Space Telescope.

Milky Way has 3 more satellite galaxies

At least! Six other objects could be either dwarf galaxies or globular clusters. These humble Milky Way satellites are a key to the dark matter puzzle.

March 20 eclipse and the Saros

There are currently 40 different Saros series in progress, each with its own assigned number. The total solar eclipse of March 20, 2015 belongs to Saros 120.

Watch MMS spacecraft launch March 12

A stack of four identical spacecraft will study Earth's magnetosphere - the comet-shaped magnetic shield that protects us from "space weather." Watch the launch.

Earth-directed solar X-flare March 11

The sun has been relatively quiet, and this is the first X-flare of 2015. It caused a brief radio blackout at some frequencies. Possible aurora alert ahead.

Video: Dance of the Northern Lights

A quiet night for auroras at Churchill, Manitoba, Canada - located at at 58° North, under the auroral oval - is a spectacular auroral display for most of us.

Dusty galaxy in the early universe

A very early galaxy containing what astronomers call "dust" - elements such as carbon, iron and oxygen - raw materials for making planets.