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AST-101

Astronomy

Answer
What is the largest moon in our solar system? Ganymede
Which moon has the most geological activity? Io
What is responsible for the tremendous volcanic activity on Io? Tribal Heating
What is the jovian moon with the thickest atmosphere? Titan
Saturn's rings are composed of... Tons of individual particles of ice and rock
Why can we see Saturn's rings? Light from the sun is reflected and scattered off the particles in the rings.
Do all of Saturn's rings orbit at the same rate? NO, particles in the inner rings orbit faster than particle in the outer rings
The tail of a comet is formed by... Interactions with light and solar wind
Coma Bright spherical part of a comet observed when close to the sun.
Plasma Tail Stretches directly away from the sun.
Frozen portion of a comet Nucleus.
Smallest Doppler Shift is equal to... Weakest gravitational force.
Astrometric technique measures Positions of a star in the sky.
Transit technique measures Slight, periodic, dimming of a star (Best for finding Earth sized planets soon).
Discovering planets through the Doppler technique requires.. obtaining and studying many spectra from the same star
The keepler Mission Currently searching for planet transits around some 100,000 stars
GAIA Astronomy Mission Being designed to measure small changes in stellar positions. May help us find many extrasolar planets
If the Sun was the size if a grapefruit Earth is... The size of a pin top 15m away
If the Sun is the size of a grapefruit Pluto is... 1 mile away
1Ly = ? AU 1Ly=9.46x10^12km 1AU=1.49x10^8Km ................. 9.46x10^12/1.49x10^8 = 6.35x10^4 AU/Ly
Force of Gravity for Earth = ? Fg=G Ma1*M2/r^2 ................ (6.67x10^-11)(5.97x1024)(100kg) / 6378000(turned into m)^2 ANSWER: 979m/kg*s^2
Created by: Mlkihorany
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