'How old are supernovas?': NASA astronomers rewind clock to estimate star explosion age

Researchers at NASA are rewinding clock to calculate of Superva blast. NASA's Hubble Telescope captured an explosion of a nearby star, scientists are w trying to calculate an accurate estimate of location and time of stellar detonation. According to a release by NASA, “ victim is a star that exploded long ago in Small Mllanic Cloud, a satellite galaxy to our Milky Way.” Moreover, after explosion, dying star left behind an expanding, gaseous corpse, a superva remnant named 1E 0102.2-7219, which was observed by NASA's Einstein Observatory first discovered in X-rays.

Scientists at NASA are w studying archival ims captured by Hubble and are analyzing rare visible-light observations which were me by astromers 10 years apart. In order to find accurate explosion , a research team, led by John Bavetz and Danny Milisavljevic of Purdue University in West Lafayette, Indiana, studied velocities of 45 tpole-shaped, oxygen-rich clumps of ‘ejecta’ flung by superva blast. According to NASA, “ionized oxygen is an excellent tracer because it glows brightest in visible light.” Astromers observed at least 22 fastest moving ejecta clumps that travelled through interstellar material to determine accurate of superva explosion. y also studied backward motion of ejecta until it coalesced to identify explosion’s accurate site. 

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Calculated speed of neutron star

“Light from blast arrived at Earth 1,700 years ago, during decline of Roman Empire. However, superva would only have been visible to inhabitants of Earth's sourn hemisphere,” NASA said in release. However, individual research indicated that each of se phemena occurred between 2,000 and 1,000 years ago. "A prior study compared ims were taken years apart with two different cameras on Hubble, Wide Field Planetary Camera 2 and vanced Camera for Surveys (ACS),” scientist Milisavljevic said. "But our study compares data were taken with same camera, ACS, making comparison much more robust; kts were much easier to track using same instrument,” he ded.

Furrmore, using Hubble, astromers calculated speed of suspected neutron star, moving at more than 2 million miles per hour from center of explosion. "That is pretty fast and at extreme end of how fast we think a neutron star can be moving, even if it got a kick from superva explosion," Bavetz said. "More recent investigations call into question wher object is actually surviving neutron star of superva explosion,” he ded. 

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(Im Credit: NASA)