Planets
Define Irregular Galaxy
no regular shapes. also, bright young stars.
Define Highland.
Oldest, most highly cratered regions of the moon
When our sun runs out of hydrogen it will be come what?
Red Giant
The movement of Earth on its axis.
Rotation
what are the rings around Saturn made of?
Hydrogen, helium, water vapor. etc.
Define Quasar Galaxy.
Active, young galaxies with black holes at their centers
The length of time it takes to get through all moon phases.
29.5 days
As a star's density and temperature increases (after a compositional change) what else increases?
Luminosity (Brightness)
Define Planetismal.
One of the small asteroid-like bodies that can help form planets
Define New Moon.
Describe the difference between apparent and absolute magnitude.
apparent magnitude: the amount of light from the star that reaches Earth
absolute magnitude:the amount of light a star actually gives off
Define Interferometry.
process that links separate telescopes so they act as one telescope, producing more detailed images as the distance between them increases.
Why is Venus considered the hottest planet in the Solar System?
What is it has a a large amount of greenhouse gases and a thick atmosphere
What is the difference between the waxing and waning phases?
Waxing- the illuminated side is more visible
Waning- the illuminated side is less visible
Define Supernova.
tremendous explosion in which a star breaks apart, releasing energy and newly formed elements
Define Galaxy.
a large group of stars, dust, and gas held together by gravity.
what is the giant red spot on Jupiter
many high pressure gas storms in that area
What is the big bang?
What is a theory on the beginning of the universe when a small point of energy violently expands to create all matter
What is the difference between a solar and lunar eclipse?
Solar- moon's shadow appears on Earth's surface
Lunar- Earth's shadow appears on the moon's surface
Color
Temperature
Size
Brightness
Composition
Define both reflecting and refracting telescopes.
Reflecting- concave mirrors to collect and focus light
Refracting- convex lenses to gather and focus light