Galaxy Flashcards
Things in space visible to us?
6,000 Stars
5 planets
Other galaxies
What measures how long it takes for light to travel in one year?
Light-year
How long does it take light to reach Earth?
8 minutes and 20 seconds
One light year=
1 trillion years = 6 trillion miles
Light that doesn’t travel through matter is called?
Photons
What is Radiation?
Atoms that do NOT move, transfer/shares energy
What is convection?
Atoms DO move
What is a convection current?
Cycle where hot air goes up, cool air goes down
The closest star to us is called?
Alpha Centauri
How far away is the closest star to us?
4 light years
What shows temp, size, shape, and brightness all on one chart?
HR diagram
How long does sunlight take to reach Pluto?
5 hours
What scientist discovered the Big Bang?
Edwin Hubble
The scientist above looked into the sky thinking he’d see? (Ed Hu)
Blueshift
He instead saw? (Ed Hu)
Redshift
What device helped us hear the Big Bang?
Horn Interna
Who created it? (Ho In)
AT and T
What is the Doppler effect?
When something is moving away and looks blue.
The galaxy types and their shapes:
Spiral -> Pinwheel
Elliptical -> Sphere/circle
Irregular -> not-defined
What does AU mean?
Astronomical Unit
Which is the hottest planet and why?
Venus
Because of its think atmosphere
When material comes together/ is smashed together and is held by gravity/heat/friction
Accretion
What do we call the material that comes out of black holes?
Quasor
(End of the universe options)
Universe keeps expanding, gravity can’t make new stars is called?
Big freeze
(End of the universe options)
Universe expands, stops, gravity pulls it back, New Big Bang is called?
Big Crunch
What is Dark Matter?
An idea to as why the universe is expanding (not proven)
What are other planets that orbit other stars called?
Exoplanets
Naturally made satellites?
Our moon, the Sun
Human made satellites?
Hubble space telescope
James Webb telescope
What do we call the inner four planets, because they’re made of rock?
Terrestrial
What is a brown dwarf?
A failed star
What do we call a rock in space?
Asteroid
When the rock goes through the atmosphere it’s called?
A Meteor
When the rock hits the ground it’s called?
A Meteorite
The imprint a space rock leaves behind in Earth is called?
A Crater
Common name for space rock?
Shooting Star
What is a big chunk of ice that floats in space and doesn’t follow the disk shape?
Comet
How far across is Pluto?
310 miles
What is the closest galaxy to us?
Andromeda
