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What is the Milky Way?
The galaxy that includes the solar system; appears as a hazy white band in the night sky
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What is a galaxy?
A huge collection of stars, planets, gas, anddust that is held together by gravity.
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What is a super cluster?
A super cluster is a collection of stars held together by gravity.
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Whatis a open cluster?
A open cluster is a collection of 50 to 1000 stars; open clusters appear along the main band of the Milky Way.
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What is a globular cluster?
a globular cluster is a collection of 100000 to a million stars that is arranged in a distinctive spherical shape; globular clusters are around the centre of the Milky Way.
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What is a local group?
A local group is the small group of about 40 galaxies that includes the Milky Way.
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What is a super cluster?
A super cluser is a gigantic cluster of 4 to 25 clusters ofgalaxies that is hundreds of millions of light-years in size.
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What are the different shapes of all the galaxies?
- Spiral: A spiral shape has a central bulge and curved arms sticking out creating a spiral shape.
- Eliptical: Spherical or like a foot ball
- Irregular: No specfic shape
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What is Cosmology?
Cosmology is the study of the universe.
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What is the Doppler Affect?
This is the change in pitch of a sound due to the motion of the source relative to an observer; also, the change in frequency of a light source due to its motion relative to an observer.
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What is Red Shift?
Redshift is the effect in which objects moving away from an observer have their wavelengths lengthened, toward the red end of the visible spectrum.
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What is Blue Shift?
Blue Shift is the effect in which objects moving toward anobserver have their wavelengths shortened, toward the blue end of the visible spectrum.
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What is the Big Bang?
The big bang is the event that may have triggered the expansion of the universe 14 billion years ago.
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What is cosmic microwave background (CMB) Radiation?
CMB is the radiation left over from the big band, which fills the universe.
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What is Dark Matter?
Dark Matter is the most abundant form of matter in the universe,invisible to telescopes.
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What is Dark Energy?
Dark Energy is a form of energy that makes up nearly three of the universe; has effect of increasing the expansion of the universe.
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