are stars from other galaxies visible?
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The answer is no – unless you count seeing the combined light of many billions of stars. From the Northern Hemisphere, the only galaxy outside our Milky Way that's easily visible to the eye is the great galaxy in the constellation Andromeda, also known as M31. ... This is the edgewise view into our own Milky Way galaxy.
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Quasars are typically more than 100 times brighter than the galaxies which host them! Quasars also emit jets from their central regions, which can be larger in extent than the host galaxy.
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Astronomers have found that our galaxy has two general populations of stars. Population I stars are younger stars found in the disk of the galaxy that contain lots of atoms heavier than helium (metals). Population II stars are older, metal-poor stars found in a galaxy's nuclear bulge, halo, and globular clusters.
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Galaxies and constellations have one item in common: stars. Other than that, they are separate objects. Sometimes a galaxy may appear to reside inside a constellation, but this is because of our vantage point on Earth. The distance between them is millions of light years at times.
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7. Stars during eclipses. Stars can be seen in the daytime sky, but this is a bit of a cheat. Stars, along with the brighter planets already mentioned, can be seen with the unaided human eye in a daytime sky (that is, when the sun is above the horizon) normally only during a total solar eclipse.
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We actually belong to the Sagittarius Dwarf galaxy. As with most pseudoscientific claims, this one has some truth to it. The Milky Way is indeed cannibalizing another, smaller galaxy. The MW is bigger, and so its gravity did rip the smaller galaxy up, turning into a long ribbon or stream of stars.
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Astronomers use telescopes to see objects at wavelengths all across the electromagnetic spectrum. Some very hot stars emit light primarily at ultraviolet wavelengths. There are extremely hot objects that emit X-rays and even gamma rays. Some very cool stars shine mostly in the infrared light wavelengths.
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The answer is no. All the stars we see with the eye alone belong to our Milky Way. But there is one distant galaxy you can see from Earth. Almost gone!
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A star's brightness, or luminosity, depends on the star's surface temperature and size. If two stars have the same surface temperature, the larger star will be more luminous. The Hertzsprung-Russell (H-R) diagram below is a scatter plot that shows the relative temperatures and luminosities of various stars.
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They are the building blocks of galaxies, of which there are billions in the universe. It's impossible to know how many stars exist, but astronomers estimate that in our Milky Way galaxy alone, there are about 300 billion.
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The Hubble Space Telescope can view objects in more than just visible light, including ultraviolet, visible and infrared light. These observations enable astronomers to determine certain physical characteristics of objects, such as their temperature, composition and velocity.
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All the stars we see in the night sky are in our own Milky Way Galaxy. Our galaxy is called the Milky Way because it appears as a milky band of light in the sky when you see it in a really dark area. It is very difficult to count the number of stars in the Milky Way from our position inside the galaxy.
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Stars other than our sun are so far distant that astronomers speak of their distances not in terms of kilometers or miles – but in light-years. Light is the fastest-moving stuff in the universe.
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The answer is no. All the stars we see with the eye alone belong to our Milky Way. But there is one distant galaxy you can see from Earth.
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Our Sun (a star) and all the planets around it are part of a galaxy known as the Milky Way Galaxy. A galaxy is a large group of stars, gas, and dust bound together by gravity. ... The Milky Way is a large barred spiral galaxy. All the stars we see in the night sky are in our own Milky Way Galaxy.
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On a stellar scale, it's really quite average — about half of the known stars are larger; half are smaller. The largest known star in the universe is UY Scuti, a hypergiant with a radius around 1,700 times larger than the sun.
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What is the difference between a galaxy and a star? While galaxies are massive systems made up of stars, dust, and gas clouds, stars are big, gaseous bodies that undergo nuclear reactions and emit light.