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What does the light astronomers observe through telescopes tell them about galaxies?
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Who looks through telescopes at the stars?
Astronomers and stargazers.
When scientists look at very distant galaxies through powerful telescopes they see the galaxies as they were millions or billions of year ago. Why is this?
The vast distances involved means that the light we see left those galaxies a long time ago.
How do planets look through a telescope?
Telescopes are inanimate objects and dont' "see" anything. However, yes, reflector telescopes can be used to observe planets; the vast majority of large scopes are of the reflector type.
Why do astronomers theorize that most of matter in galaxies and clusters is dark matter?
Dark matter may be invisible to light, but it can still be detected, through its gravitational interactions. Specifically, it can be detected: * By the fact that galaxies rotate way too fast, for the amount of known matter. * By gravitational lensing.
Can an asteroid be seen?
yes any asteroid can be seen which is in our solar system can be seen.they are very small so they can not be seen through the naked eye(but an asteroid called vesta which was discovered in 1807 is the only asteroid which can be seen).you will need a telescope to see and to observe asteroids but since space is dark and also since asteroids are small and dark we can see them even better through bigger telescopes,radio telescopes, and orbiting telescopes(Hubble).
Who looks through telescopes at the stars?
Astronomers and stargazers.
Explain how astronomers use electromagnetic radiation to study space?
Electromagnetic radiation is "light." Light in various wavelengths (gamma rays through to infrared) comes to us from out in space, and astronomers use instruments called telescopes to capture it and observe the bodies and processes emitting this light.
Telescopes are used by astronomers for?
To study outer space in greater detail through magnification.
Why do optical astronomers place telescopes at the top of mountains while radio astronomers put their telescopes in valleys?
Optical telescopes are placed high to avoid having to look through the thickest part of the atmosphere. Radio telescopes are place in valleys to avoid the effects of man-made electrical noise in the telescope.
What evidence do astronomers have that supports the idea that the galaxies are moving away from us?
Observations through telescopes, red shift and several other recordings proves this.
Do astronomers spend all their time looking through a telescope and recording their results?
Nowadays, the bulk of the work astronomers do is on computers. They spend a small portion of their time at telescopes actually taking data. Astronomically-useful telescopes rarely have eyepieces you can look through. Radio, ultraviolet, or infrared telescopes collect light that you can't even see with your eye! Telescopes that collect visible light often have electronic cameras called CCD cameras that create an image in a computer. Many telescopes are used to create a spectrum (the light is split into a rainbow, and the brightness of each color is measured). Radio telescopes record signals that astronomers can reconstruct using a computer to make an image or a spectrum.
What is optical astronomy?
The term optical telescope refers to telescopes that are used to make observations in the visible light spectrum, that the human eye can see. This is in comparison to such things as X ray telescopes, radio telescopes, etc., which are designed to make observations in parts of the electromagnetic spectrum that are invisible to the human eye.
When scientists look at very distant galaxies through powerful telescopes they see the galaxies as they were millions or billions of year ago Why is this?
The vast distances involved means that the light we see left those galaxies a long time ago.
When scientists look at very distant galaxies through powerful telescopes they see the galaxies as they were millions or billions of year ago. Why is this?
The vast distances involved means that the light we see left those galaxies a long time ago.
How do astrologists get their answers when they look through the telescope?
Scientists who look through telescopes are known as Astronomers (Astronomy). Astrologers are those who deal with the divination art of Astrology.
How do people know the galaxies exist?
We can observe it through a telescope, and by observing the galaxy as a whole, we can estimate our location in it.
What are Astronomer typical work schedule?
Very little astronomy is still done by physically looking through telescopes, so astronomers can basically work any hours they want. The really large telescopes are quite expensive and tend to be shared (and located in remote, desolate places). Most astronomers rely on dedicated on-site staff at the scope who collect images or data for the astronomers to analyze later.
