Earth Stuff
What does the Earth rotate around? How long does this take?
Rotational axis
23:56.04
How long does it take the moon to make one rotation? How long does it take the moon to make one revolution?
27.3 days
How much bigger is the Sun than the Earth? Diameter and volume.
109 x diameter
1.3 M volume
All stars come from a cloud of dust and gas called a...
stellar nebula
When an object spins around its own axis...
rotation
What does the Earth revolve around? How long does this take?
The Sun
365.25 days
When you can see the right half of the Moon, this is...
First Quarter
The Sun is currently in what stage of its life cycle? What stage is next?
Main sequence
Red Giant
What stage follows a Red Supergiant?
Supernova
When something orbits around something else...
revolution
When is the Earth closest to the Sun during its orbit?
January
When you can see the just a silver of the left side of the Moon, this is...
Waning Crescent
The Sun is fusing ________ into ________ in its ________.
Hydrogen
Helium
Core
What's the difference between apparent and absolute magnitude?
absolute: actual brightness / luminosity
When the moon moves into the Earth's umbra, this is a...
lunar eclipse
What is the tilt of Earth's rotational axis?
23.5
What are two ways the Moon impacts Earth?
Stabilizes axial tilt
Light at night
Creates high and low tides
What are the next two stages of the Sun's lifecycle?
Red Giant
White Dwarf
What is a star?
Self-luminous sphere of plasma held together by its own gravity
E48 star has a greater apparent magnitude than G6 star, but both stars have the same absolute magnitude. Which star is farther away?
G6 star - it appears dimmer because it's farther away.
Why do parts of Earth experience seasons?
Earth's axis is tilted, which causes some places to get more direct sunlight part of the year and less direct sunlight during part of the year.
Why does the moon appear to have phases when viewed from Earth?
The moon is always half-illuminated and half-dark. Sometimes we see the illuminated side fully, partially, or not at all.
What are the six layers of the Sun? 3 interior, 3 exterior.
Core, Radiative Zone, Convective Zone
Photosphere, Chromosphere, Corona
What are the five (possible) stages of life for a high mass star?
Main sequence, Red Supergiant, Supernova, Black Hole, Neutron Star
What is it called when we experience 12 hours of light and 12 hours of darkness?
Equinox