Astronomy
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| What is the largest moon in our solar system? | Ganymede
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| Which moon has the most geological activity? | Io
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| What is responsible for the tremendous volcanic activity on Io? | Tribal Heating
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| What is the jovian moon with the thickest atmosphere? | Titan
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| Saturn's rings are composed of... | Tons of individual particles of ice and rock
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| Why can we see Saturn's rings? | Light from the sun is reflected and scattered off the particles in the rings.
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| 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
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| The tail of a comet is formed by... | Interactions with light and solar wind
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| Coma | Bright spherical part of a comet observed when close to the sun.
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| Plasma Tail | Stretches directly away from the sun.
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| Frozen portion of a comet | Nucleus.
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| Smallest Doppler Shift is equal to... | Weakest gravitational force.
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| Astrometric technique measures | Positions of a star in the sky.
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| Transit technique measures | Slight, periodic, dimming of a star (Best for finding Earth sized planets soon).
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| Discovering planets through the Doppler technique requires.. | obtaining and studying many spectra from the same star
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| The keepler Mission | Currently searching for planet transits around some 100,000 stars
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| GAIA Astronomy Mission | Being designed to measure small changes in stellar positions. May help us find many extrasolar planets
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| If the Sun was the size if a grapefruit Earth is... | The size of a pin top 15m away
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| If the Sun is the size of a grapefruit Pluto is... | 1 mile away
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| 1Ly = ? AU | 1Ly=9.46x10^12km
1AU=1.49x10^8Km
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9.46x10^12/1.49x10^8 = 6.35x10^4 AU/Ly
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| Force of Gravity for Earth = ? | Fg=G Ma1*M2/r^2
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(6.67x10^-11)(5.97x1024)(100kg) / 6378000(turned into m)^2
ANSWER: 979m/kg*s^2
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Created by:
Mlkihorany
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