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  Cosmic sleuths are attempting to locate one of the estimated one billion neutron stars in the Milky Way–the collapsed core of a doomed supergiant star with the density of atomic nuclei–that was ejected from the blast of a supernova in the Small Magellanic Cloud, a satellite galaxy to our Milky Way 1,700 years ago during the decline of the Roman Empire. The light of a supernova is visible across billions of light years, releasing as much energy in an instant as our sun will produce over its 10-billion-year lifetime. The suspected neutron star was identified in observations with the Euro...

Astronomers using the Hubble Space Telescope to study a supernova remnant in the Small Magellanic Cloud have determined light from the blast reached Earth 1,700 years ago during the decline of the Roman Empire. While it would have been visible to inhabitants of the southern hemisphere, there are no known records of any observations. Located some 200,000 light years away, the remnant is known as 1E 0102.2-7219. As shown below, gaseous knots in the expanding cloud of debris that are headed in Earth’s general direction are shown in blue while those moving away appear read. The cloud is expandi...

Astronomers have used the Hubble Space Telescope to turn back time and determine a more accurate estimate of a supernova explosion's location and time. The star

About 200,000 years ago, a massive star in a nearby companion galaxy to the Milky Way exploded. Blasting octillions of tons of debris outwards at high velocity, the explosion has been expanding into space ever since. Today it looks like a swirl of cirrus clouds, its huge velocity diminished almost to motionlessness by distance. But the actual expansion is measurable, and by using a clever technique that runs the clock on it backwards, astronomers have determined when the light of the explosion first reached Earth: 1746 years ago, give or take 175 *. Zoom In A wide field of view Hubble image o...

Last Updated: NASA Shares Magnificent Picture Of 5 Million Years Young Star Cluster Named 'NGC 602' NASA on January 16 shared the image of "5 million years young and dazzling star cluster" on its official Instagram account and netizens call it 'magical' NASA shared an image of "5 million years young and dazzling star cluster" on its official Instagram account on January 16. The US space agency shared the image with a caption stating that the colour of a star is directly linked to its surface temperature. NASA said that the hotter the star, the shorter the wavelength of light it will emi...