NASA visualization rounds up the best-known black hole systems
Nearby black holes and their stellar companions form an astrophysical rogues' gallery in this new NASA visualization.
Nearby black holes and their stellar companions form an astrophysical rogues' gallery in this new NASA visualization.
Astronomy
May 03, 2022
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Imagine walking through a dense, hazy fog in the middle of the night, seeing patches of light from cars and towns shimmering in the distance. It's nearly impossible to tell if the lights are deep in the fog or beyond it. ...
Astronomy
May 16, 2022
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An international team of astronomers reports the finding of a new pulsar in the Large Magellanic Cloud (LMC) as part of the Australian Square Kilometre Array Pathfinder (ASKAP) Variables and Slow Transients (VAST) survey. ...
Using tens of thousands of stars observed by the Gaia space probe, astronomers from MPIA and Chalmers have revealed the 3D shapes of two large star-forming molecular clouds, the California Cloud and the Orion A Cloud. In ...
Astronomy
May 19, 2022
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Stars tend to form in clusters or groups of between ten and several thousand stars that share the same age and composition, although in different evolutionary phases. Among the clusters in the Milky Way, the very young Westerlund ...
Astronomy
9 hours ago
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A cloud is a visible mass of droplets or frozen crystals suspended in the atmosphere above the surface of the Earth or another planetary body. A cloud is also a visible mass attracted by gravity, such as masses of material in space called interstellar clouds and nebulae. Clouds are studied in the nephology or cloud physics branch of meteorology.
On Earth the condensing substance is typically water vapor, which forms small droplets or ice crystals, typically 0.01 mm in diameter. When surrounded by billions of other droplets or crystals they become visible as clouds. Dense deep clouds exhibit a high reflectance (70% to 95%) throughout the visible range of wavelengths. They thus appear white, at least from the top. Cloud droplets tend to scatter light efficiently, so that the intensity of the solar radiation decreases with depth into the gases, hence the gray or even sometimes dark appearance at the base. Thin clouds may appear to have acquired the color of their environment or background and clouds illuminated by non-white light, such as during sunrise or sunset, may appear colored accordingly. In the near-infrared range, clouds look darker because the water that constitutes the cloud droplets strongly absorbs solar radiation at those wavelengths.
This text uses material from Wikipedia, licensed under CC BY-SA