Astronomy Flashcards

1
Q

Comets often have a ____?

A

Tail

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2
Q

What are comets made of

A

Dust, rock, frozen water, gas

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3
Q

What kind of orbit do comets move in

A

Elliptical

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4
Q

What is a space rock called while it is in orbit still

A

Meteroid

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5
Q

What is a space rock called when it is in Earth’s atmosphere

A

Meteor

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6
Q

What is a space rock called when it hits earth

A

Meteorite

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7
Q

Why are asteroids not planets

A

Because they are too small, and not enough gravitational pull to clear the area.

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8
Q

Where is the asteroid belt located

A

Mars and Jupiter

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9
Q

Name 2 asteroids

A

1 Ceres and Mathilde

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10
Q

What is a meteor shower

A

a celestial event in which a number of meteors are observed to radiate, or originate, from one point in the night sky.

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11
Q

What’s a meteor

A

a small body of matter from outer space that enters the earth’s atmosphere (space rock)

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12
Q

What’s an asteroid

A

asteroid is a minor planet–an object that is neither a planet nor a comet–that orbits within the inner Solar System.

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13
Q

What’s a comet

A

Comets are frozen leftovers from the formation of the solar system composed of dust, rock, and ices.

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14
Q

What are the 3 types of galaxy shapes

A

Elliptical, Spiral, Irregular

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15
Q

How many arms are spiral galaxy made of

A

2

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16
Q

What is our home galaxy called

A

Milky Way Galaxy

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17
Q

What is our neighboring galaxy

A

The Andromeda Galaxy

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18
Q

What is our neighboring star

A

Alpha Centauri

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19
Q

At the center of every spiral galaxy is a ________

A

Black Hole

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20
Q

What is a nebula

A

A huge cloud of dust and gas, within galaxies

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21
Q

What are galaxies held together by

A

Gravity

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22
Q

Name 2 meteor showers

A

Perseids and Lyrids (or Eta Aquarids)

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23
Q

Name 2 comets

A

Halley’s Comet, Hale Bopp

24
Q

What is a satellite

A

Something that orbits around a planet

25
How many planets have satellites
6/8
26
Name 2 satellites
Moons, Sputnik 1, Explorer 1, the ISS
27
Which planet has the most moons
Jupiter or Saturn??
28
Which planets have no moons
Mercury ans Venus
29
Which planet is names after the God of agriculture
Saturn
30
Name 3 things satellites are used for
Mapping, weather detection, TV, telephone
31
What's the avg speed the ISS orbits around Earth
27,700 km/h
32
What is astronomy
It is the study of the universe and everything within it
33
What's the altitude that space begins
The Kármán Line
34
Where is the Kármán line located
100 km above ground level
35
TroStMeThEx is?
The order of the atmosphere bottom to top, excluding ground level
36
List the atmosphere bottom to top (TroStMeThEx)
Troposphere, Stratosphere, Mesosphere, Thermosphere, Exosphere
37
Which atmosphere is the Kármán Line?
Thermosphere
38
Which atmosphere do you find meteors
Mesophere
39
How high up is the troposphere
6-20km
40
How high up is the stratosphere
50km
41
How high up is the mesophere
85 km
42
How high up is the thermosphere
690 km
43
How high up is the exosphere
10,000 km
44
Where do most visible objects float around (hot air balloons, airplanes)
Right between ground level and the troposphere
45
What is a constellation
A group of stars that form a recognizable pattern
46
What are the views of the universe
Geocentric (earth, old) and Heliocentric (sun, current)
47
What is it called when Earth catches up to a planet making it look like the observed planet is going backwards?
Retrograde motion
48
Who made the heliocentric universe model
Nicholas Copernicus
49
Who made the geocentric universe model
Ptolemy
50
What is the solar system
A collection of sun, planets, satellites, comets, asteroids, meteors, and space debris
51
Fastest moving planet?
Mercury
52
Uranus rotates on its
Side!
53
The largest planet?
Jupiter
54
The hottest planet
Venus
55
How many rings does Saturn have
7
56
Why is Neptune blue
Because of the high concentration of methane gas