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Stars > Stars > Flashcards

Stars Flashcards

1
Q

Absolute Magnitude

A

A brightness scale used to measure how bright a star would be if it were seen from a standard distance

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2
Q

Apparent Magnitude

A

The brightness of a star as seen from earth

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3
Q

Galaxy

A

A Large collection of stars, dust and gas bounds

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4
Q

H-R Diagram

A

Hertzsprung-Russell diagram, a graph that shows the relationship between a stars surface temepeture

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5
Q

Light Year

A

the distance that light travels through space in one year

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6
Q

Luminosity

A

The actual brightness of an object such as a star

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7
Q

Main Sequence

A

The region on the H-R diagram where the stars spend most of there lives

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8
Q

Nebula

A

a large cloud of dust and gas in interstellar space

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9
Q

Neutron Star

A

The core of a supernova that has collapsed under gravity

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10
Q

Planet

A

a relatively large spherical body that orbits a star

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11
Q

Pulsar

A

a highly magnetized rotating neutron star that emits a beam of radiation

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12
Q

Revolution

A

the motion of a body that travels around another body in space

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13
Q

Rotation

A

The spin of a body on its axis

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14
Q

Solar System

A

The collection of large and small bodies that orbit our star

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15
Q

Star

A

A large body of composed gas

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16
Q

Wavelength

A

The distance between two adjacent crests of a wave

17
Q

Supernova

A

A gigantic explosion of a star

18
Q

Universe

A

Space and all the matter and energy in it

19
Q

White dwarf

A

The hot dense dim core of matter that remains from a collapse star

20
Q

Spiral Galaxy

A

A galaxy shaped like a pinwheel

21
Q

Elliptical galaxy

A

a spherical galaxy

22
Q

irregular galaxy

A

a galaxy with an irregular shape

23
Q

Electromagnetic Spectrum

A

all of the different wavelengths

24
Q

Big Bang theory

A

The theory that all matter and energy in the universe was compressed into a extremely small volume

25
Q

Cosmic microwave background

A

The electromagnetic radiation left over from the formation of the universe

26
Q

Red shift

A

A phenomenon which occurs when a star is moving away from the earth

27
Q

Doppler effect

A

an observed change in frequency when the source is moving with respect to the observer

28
Q

Spectrooscope

A

a tool used to collect light from stars and separate the colors in the light

Stars (1 decks)

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