Measurement
What does AU stand for?
Astronomical Unit
Name two major moon phases.
New moon, waxing crescent, first quarter, waxing gibbous, full moon, waning gibbous, last quarter, waning crescent.
Name one type of eclipse.
Solar, partial, annular and hybrid.
What is a simple definition of a star?
Ball of gas
What do radio telescopes do?
Detect radio waves from space.
How far is the Earth from the Sun? (In AU's)
1 AU
Define waxing and waning.
Waxing- growing
Waning- shrinking
Are there solar transits for other planets (such as Mars and Jupiter)?
No
What does a star consist of?
Mostly hydrogen and some helium
Hubble + James Webb
How many kilometers is one light year?
9.46 trillion km
When does the solar eclipse occur?
During the New Moon
How many transits of Mercury occur each century?
13
About how many stars are in our milky way?
100 billion
What is the difference between refracting and reflecting telescopes?
Refracting- uses lenses
Reflecting- uses mirrors
What special units do scientists use to measure space?
AU's, light-years, parsecs
How much is the moon tilted?
5 degrees
What is a partial eclipse?
When the moon crosses the path of the sun.
What kind of clouds do stars form in?
Molecular clouds
What do rovers study?
They study geology and search for signs of past life.
How many light years is in one parsec?
3.26 ly
When do eclipses occur?
They occur when the Sun, Earth and Moon align at the nodes.
What is an annular eclipse?
When the moon completely covers the center of the sun.
What is the life cycle of a star?
1. Nebula
2.Protostar
3. Main-sequence
4. Red giant/supergiant
5. Stellar remnant
What does a spectroscope do?
Determine composition of stars and planets.