Several people, including Johannes van Heeck, noted the sudden appearance of this star, but it was Johannes Kepler who became noted for his systematic study of the object itself. The most recent supernova to be seen in the Milky Way galaxy was SN 1604, which was observed on October 9, 1604. Typical supernova get brighter during the first 3 weeks or so after that very fast explosion. What we observe as the actual supernova is the light and energy that come out of that explosion. Most supernova take a fraction of a second up to a couple seconds to explode. How long would it take for us to see a star explode? Aside from our sun, the dots of light we see in the sky are all light-years from Earth. Stars are huge celestial bodies made mostly of hydrogen and helium that produce light and heat from the churning nuclear forges inside their cores. These stars are usually no more than about 10,000 light years away, so the light we see left them about 10,000 years ago. See also what are elements made up of How old are the stars we see?įor the most part, the stars you see with the naked eye (that is, without a telescope) are still alive. Scientists discovered the new planet in the Alpha Centauri system the nearest trio of stars to Earth. … What does a star look like when it dies? Has anyone seen a star up close?Īn international team of astronomers has produced the first detailed image of the surface of a giant star – named Pi 1 Gruis – that’s about 530 light-years from Earth in the constellation Grus (Latin for ‘crane’). A red star is the coolest, but still is about 5,000° Fahrenheit! Our sun is yellowish-white and the surface is about 10,000° Fahrenheit. The inset image shows the two primary stars, A and B (a 3rd star, Proxima, lies some distance away). The color depends on how hot the star is. A new planet next door Alpha Centauri is the closest star system to our sun. Stars come in colors from red, orange, yellow, white, bluish-white, and blue.
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