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Earth Science > Astronomy 1 > Flashcards

Astronomy 1 Flashcards

1
Q

Mass

A

How much matter is in an object (stays same in every planet)

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2
Q

Weight

A

gravitational pull on an object (changes on different planets since the gravity pull is different on each planet)

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3
Q

Light Year

A

distance light can travel in a year (186,000 mies per second)

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4
Q

Universe

A

everything and anything we know of

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5
Q

Galaxy

A

Cluster of stars

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6
Q

Star

A

self luminous

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7
Q

Solar system

A

Large celestial bodies revolving around star

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8
Q

Planet

A

large celestial body revolving around a star

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9
Q

Moon

A

revolves around planet

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10
Q

Milky Way Galaxy

A

spiral galaxy

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11
Q

Planet grouping

A

terrestrial planets(inner: Mercury Venus, Earth, and Mars), and jovian planets(outer: Jupiter, Saturn, Uranus, Neptune)

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12
Q

comet

A

ball of dirty ice, orbit around sun

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13
Q

Star (our sun) main elements

A

Hydrogen and Helium

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14
Q

Electromagnetic Energy

A

sun produces it, all comes in wavelengths of the electromagnetic spectrum

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15
Q

Normally, visible light is:

A

White

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16
Q

Shifting to an end of a spectrum is due to

A

Doppler effect

17
Q

Red Shifting:

A

moving away from us

18
Q

Blue shifting:

A

Moving towards us

19
Q

Is our universe expanding or not?

A

expanding

20
Q

Big Bang Theory, and how long ago was this?

A

Expansion started with a big bang, 13.7 billion years ago

21
Q

Difference between different kinds of electromagnetic energy?

A

wavelength/size

22
Q

Process where star releases tons of energy

A

Nuclear Fusion

23
Q

Sun

A

Main sequence

24
Q

Star Life Cycle

A

Nebula to Protostar to Main sequence to either giant or super giant! If giant: planetary nebula then white dwarf then black dwarf. If super giant: Super Nova, then based on mass of core, either black hole or Neutron Star.

25
Q

Evidence of Big Bang

A

Cosmic Background Radiation (heat)

26
Q

Unit used to express distances to other galaxies

A

light year

27
Q

As the sun ages it will be composed of…

A

more helium and less hydrogen

28
Q

Relationship between Luminosity and temp

A

Direct

Earth Science (1 decks)

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