How many light years away is Supernova 1987A?
170,000 light-years away
Since SN 1987A is located 170,000 light-years away, its current angular size as seen from Earth is expected to be about 0.1 – 0.2 arcseconds in diameter – too small to resolve with ground-based telescopes.
Can you still see Supernova 1987A?
The strikingly bright shock waves from a massive star explosion first observed in 1987 can still be seen today, three decades later. This brilliant star explosion, called Supernova 1987A, occurred only 160,000 light-years from Earth in a satellite galaxy of the Milky Way known as the Large Magellanic Cloud.
When did Supernova 1987A actually occur?
Supernova 1987A is located in a nearby galaxy called the Large Magellanic Cloud. This galaxy is about 160,000 light years from Earth, so when it was first observed by optical telescopes in 1987, the event had actually occurred about 158,013 B.C. We are seeing a delayed-action replay of the actual event.
How old is the Supernova 1987A?
1987A’s light reached Earth on February 23, 1987, and as the earliest supernova discovered that year, was labeled “1987A”….SN 1987A.
| Supernova 1987A is the bright star at the centre of the image, near the Tarantula nebula. | |
|---|---|
| Event type | Supernova |
| Progenitor | Sanduleak -69 202 |
| Progenitor type | B3 supergiant |
| Colour (B-V) | +0.085 |
How long ago did Supernova 1987A explode?
160,000 years ago
Closest supernova since 1604. Supernova 1987A was the brightest supernova seen from Earth in the four centuries since the telescope was invented. The explosion occurred 160,000 years ago, on the outskirts of the Tarantula Nebula in the Large Magellanic Cloud – a nearby dwarf galaxy.
How many Super Nova rings are there?
The spectrum showed hydrogen lines expanding at 12,000 km per second, followed by a long period of slow decline. There are 270 known supernova remnants, almost all observed by their strong radio emission, which can penetrate the obscuring dust in the galaxy.