On February 24, 1987,
something unusual happened as astronomers Oscar Dhalde and Ian Shelton observed
an unbelievable picture sitting on the top of a Chilean mountain: a new star in
the night sky. That is something not happened frequently.
New video released by
NASA shows a revolutionary astronomical moment in a whole new light. Most
astronomers agree the explosion occurred because the star's core ran low on
high-energy fuel, while some believe another star merged with the blue
super-giant to generate the blast.
A photo of Supernova 1987A's remnants as seen by the Hubble space telescope. GSFC/NOAO/NASA/ESA/STIS Instrument Definition Team
In that moment, the
fusion-powered core of the star began to fade. The cause could be any one of
both as the star collapsed under its own gravity, exploded, created the power
of 100 million suns in the process. We now call the object Supernova 1987A, or
SN 1987A.
It is the first time
when scientists were being able to record the supernova, and it was also the
brightest one, seen for last hundred years.
NASA's Chandra X-ray
Observatory team said: "Supernova 1987A became one of the best
opportunities ever for astronomers to study the phases before, during, and
after the death of a star”.
This data that has been
recorded gives astronomers an extra edge to study of how stars form and die.
NASA recently honored the supernova's anniversary with a bunch of new
multimedia, and a few of the images and an animation caught our eye.
This animation gives
you some hint about that where in the night sky SN 1987A is located.
The remnants lurk
inside the Large Magellanic Cloud, a dwarf galaxy that trails the Milky Way
some 168,000 light-years from Earth.
It took really long for
the light to reach us as this event technically happened 168,000 years in the
past.
About once a month over
the course of more than past many years, the Hubble space telescope has
photographed SN 1987A and its traveling shock wave.
Starting around the
year 2000, they saw the shockwave begin slamming into a 1-light-year-wide ring
of gas and dust that the star threw off before its death, creating a brilliant,
bubbling glow.
According to a
pre-print study posted to arXiv.org, researchers now believe the high-speed
blast wave is leaving the field of gas and dust, marking the beginning of a
"major change" in its evolution, this new animation is of a computer
model that shows SN 1987A's explosion and entire evolution through 2017, and in
three dimensions.
The study on this model
arXiv led by, an astrophysicist Salvatore Orlando at the INAF-Osservatorio
Astronomico di Palermo in Italy.
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