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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 13, 2015
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.
March 13, 2015
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.
March 12, 2015
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.
March 11, 2015
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.
March 10, 2015
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.
March 8, 2015
Distant planet has four suns
Were it possible to see the skies from this world, the four parent stars would look like one small sun and two very bright stars visible in the daylight.
March 7, 2015
Mars lost ocean of water to space
About 4 billion years ago, a primitive ocean on Mars held more water than Earth's Arctic Ocean, say researchers, but Mars has lost 87 percent of it to space.
March 7, 2015
How often does a solar eclipse happen on the March equinox?
A total solar eclipse happened on the day of the March equinox in 2015. When is the next one after this, and how often do we get an equinox-eclipse?
March 7, 2015
Dawn spacecraft arrives at Ceres!
The Dawn spacecraft has made history. It has become the first mission to visit a dwarf planet when it successfully slipped into Ceres' orbit on March 6.
March 6, 2015
