20 de outubro de 2020 , por
The reason for the eruption is still unclear. This shows the nebula has a Swiss-cheese structure. A name or catalog number that astronomers use to identify an astronomical object. Something like 20,000 light-years from Earth lies a bizarre object.
Distances within our
Then, just as suddenly, it faded. Eventually, when light from the back side of the nebula begins to arrive, the light echo will give the illusion of contracting, and finally it will disappear by the end of this decade. The date(s) that the telescope made its observations and the total exposure time. In the video it looks like the cloud itself is expanding (you can see motion of individual structures), but that’s an illusion. Public Domain. Red supergiants are known to undergo periodic paroxysms. The different colors in the nebula reflect changes in the color of the star during its outburst. And to reiterate something I said in the video: What we’re seeing here is what’s called a light echo. It’s rare, but not impossible, and does explain what we’re seeing. Dubbed V838 Monocerotis—the 838 th variable star found in the constellation Monoceros, the unicorn—it’s a luminous red star, well over 20,000 times brighter than the Sun. The date and time the release content became public. In reality the dust shells are not expanding at all, but it is simply the light from the stellar flash that is sweeping out into the nebula. Dubbed V838 Monocerotis—the 838th variable star found in the constellation Monoceros, the unicorn—it’s a luminous red star, well over 20,000 times brighter than the Sun.
The star brightened to about a million times solar luminosity and absolute magnitude of −9.8, ensuring that at the time of maximum V838 Monocerotis was one of the most luminous stars in … V838 Monocerotis V838 Monocerotis is a red variable star, which floats in the constellation of Monoceros.
This image, obtained with the Advanced Camera for Surveys on February 8, 2004, is Hubble's latest view of an expanding halo of light around a distant star, named V838 Monocerotis (V838 Mon). Plus, whatever caused it must be something rare, or else we’d see more examples of it.
V838 Monocerotis (V838 Mon) is a red variable star in the constellation Monoceros about 20,000 light years (6 kpc)  from the Sun, and possibly one of the largest known stars.The previously unknown star was observed in early 2002 experiencing a major outburst. "Starry Night", Vincent van Gogh's famous painting, is renowned for its bold whorls of light sweeping across a raging night sky.
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