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Nova in Sagittarius

By: Ajay Talwar

 

Region: Asia

Site: Uttarakhand - India

Date: 2015 March 21

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As seen on Astronomy Picture of the Day, in this Milky Way image from Indian Himalayas there is a new star, a nova, in the middle of the Sagittarius Teapot. Click the image-top constellation icon to spot it. The erupted nova (named Sagittarii 2015 No. 2) reached magnitude 4 in March 2015, visible to naked eye. A nova is a cataclysmic nuclear explosion on a white dwarf (in a binary system), which causes a sudden massive brightening of the star. It is different from supernova, a smaller phenomenon that does not happen at the core of an old massive star and it does not destroy the star. Some nova outbursts repeat many times through the ages. Ajay Talwar

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