Chapter 1 Study Guide Flashcards
Size and location of Earth:
Earth size: 40km
Earth location: 3rd furthest from the sun
Size and location of the Sun:
Sun size: 865,370 mi in diameter
Sun Location: Center of the solar system.
Size and location of the solar system:
size: 9.09 km in diameter
location: 26k lightyears from the center of the milky way. In Orion’s arm.
Size and location of the milky way:
Size: Radius of 52,850 lightyears
Location: In the local group
Size and location of the local group:
Size: 10 million light-years in diameter
Location: Located in the Virgo supercluster
Size and location of our supercluster:
Size: 110 million light-years in diameter
Location: Near the center of the observable region in the Virgo constellation.
What is AU’s?
When should they be used?
The distance between Earth and the sun; is roughly 93 million light-years long.
Used to measure distances within the solar system.
What are lightyears?
When should they be used?
The time it takes light to reach something.
Used to measure distances outside the solar system.
Where do materials originate from?
Helium and hydrogen came from the big bang.
Heavier elements came from large stars that go supernova.
What are rotations?
A planet spinning on its own axis
What are revolutions?
A planet completes a full orbit around its star.
What is an axial tilt?
The degree to which a planet is tilted on its axis.
What is an ecliptic plane?
The apparent path of the sun through the constellation from our perspective.
Does the Earth revolve around its axis?
No, it rotates
What is Wiens Law?
Hot stars glow bluer, cold stars glow redder.
