Yes. Stars.
They study distant galaxies because they want to know whats out in other galaxies and how many planets it has
The universe's primary source of light is stars. Stars are massive balls of gas that undergo nuclear fusion, generating heat and light that radiates out into space. Other sources of light in the universe include galaxies, quasars, and other celestial objects.
No, the Sun is not the only light source in the univrse. Every star is it's own light source, just as the sun is, but due to there distance they are not very effective. The Moon also creates a light source, because it reflects the light from the Sun back to earth. In the same way, if we where on the Moon, the Earth would be a light source, reflecting the light from the Sun at the moon.
Yes, galaxies emit light primarily from the stars within them. This light can range from visible light to other forms of electromagnetic radiation such as radio waves, infrared, ultraviolet, and X-rays. The light emitted by galaxies allows astronomers to study their composition, age, and distance from Earth.
No. We already know a good deal about the speed of light. Scientists study other galxies to learn how galaxies work.
The apparent redshift is caused by the Doppler Effect; the frequency of waves is increased by an approaching source and decreased by a leaving source. Since the fgrequencies we see from stars are slightly lower than they should be, we know that the stars and other objects are moving away. The Doppler Effect causes changes of light emanating from distant stars and galaxies.
Light-years are mainly used to specify distances to other stars and galaxies, diameters of galaxies, galaxy walls, and the like.
Not in the near future. Other galaxies are hundreds of thousands, or millions, of light-years away; travelling at the speed of light, it would thus take millions of years to travel to most galaxies; travelling at a lower speed would, of course, take longer.Not in the near future. Other galaxies are hundreds of thousands, or millions, of light-years away; travelling at the speed of light, it would thus take millions of years to travel to most galaxies; travelling at a lower speed would, of course, take longer.Not in the near future. Other galaxies are hundreds of thousands, or millions, of light-years away; travelling at the speed of light, it would thus take millions of years to travel to most galaxies; travelling at a lower speed would, of course, take longer.Not in the near future. Other galaxies are hundreds of thousands, or millions, of light-years away; travelling at the speed of light, it would thus take millions of years to travel to most galaxies; travelling at a lower speed would, of course, take longer.
To take pictures of other galaxies, astronomers use telescopes equipped with sensitive cameras to capture light emitted by the distant galaxies. These telescopes are often placed in space or in remote locations to minimize interference from Earth's atmosphere and light pollution. The images captured are then processed and analyzed to study the properties and characteristics of the galaxies.
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other stars , nebulous , and galaxies
Yes, they are usually of a similar size range to other types of galaxies, from a few thousand lightyears across to a million or more. Their formation is often as a result of two or more galaxies colliding, or coming close to each other.