M 82 Supernova 2014j

SN 2014J

More information about this photo : http://www.astropixel.gr

SN 2014J is a type-Ia supernova in Messier 82 (the 'Cigar Galaxy', M82) discovered in mid-January 2014. It is the closest type-Ia supernova discovered in the past 42 years. It was discovered accidentally during an undergraduate teaching session at University of London Observatory. SN 2014J is currently the subject of an intense observing campaign by professional astronomers, and is bright enough to be seen by amateur astronomers. On 31 January 2014 SN2014J stopped brightening, reaching its peak brightness at magnitude 10.5<sup>.

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M1 The Crab Nebula

Crab Nebula in Ha filter

The Crab Nebula (catalogue designations M1, NGC 1952, Taurus A) is a supernova remnant and pulsar wind nebula in the constellation of Taurus.^[5] Corresponding to a bright supernova recorded by Chinese astronomers in 1054, the nebula was observed later by English astronomer John Bevis in 1731. At an apparent magnitude of 8.4, comparable to that of the largest moon of Saturn, it is not visible to the naked eye but can be made out using binoculars under favourable conditions.
At X-ray and gamma ray energies above 30 keV, the Crab is generally the strongest persistent source in the sky, with measured flux extending to above 10 TeV. Located at a distance of about 6,500 light-years (2 kpc) from Earth, the nebula has a diameter of 11 light years (3.4 pc, corresponding to an apparent diameter of some 7 arc minutes) and expands at a rate of about 1,500 kilometers per second (0.5% c). It is part of the Perseus Arm of the Milky Way galaxy.

Info from Wikipedia