Observing

See Mercury at its best in the evening sky

26 March 2017 Ade Ashford

Mercury attains a greatest easterly elongation of 19 degrees from the Sun on 1 April. This solar separation combined with a favourable inclination of the ecliptic to the western horizon an hour after sunset, means that the period 25 March to around 8 April offers the year’s best evening showing of the innermost planet for Northern Hemisphere observers.

Craters on Ceres
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Cratered Ceres

24 March 2017 Astronomy Now

This stunning view the cratered surface of dwarf planet Ceres comes from NASA’s Dawn spacecraft. Mission scientists believe water ice deposits exist in within some of the craters where parts are in permanent shade.

News

Andromeda’s bright X-ray mystery solved by NuSTAR

24 March 2017 Astronomy Now

The Milky Way’s closest neighbor, Andromeda, features a dominant source of high-energy X-ray emission, but its identity was mysterious until now. As reported in a new study, NASA’s NuSTAR mission has pinpointed an object responsible for this high-energy radiation.