T9L1 Quiz Flashcards
In what year did early astronomers first hypothesize why the moon and planets shone?
476 AD, Aryabhata I
Did they have telescopes back then?
Nope, they used the naked eye
The ________ is the largest and brightest object in the night sky.
moon
The moon is the Earth’s only natural _________
satellite
What is the definition of a satellite?
A body that orbits a planet
A star is a giant _______ of superheated gas, or _______ composed of hydrogen and ________.
ball, plasma, helium
Does the position of stars relative to each other change from our perspective?
Nope
Contrary to stars, ________ do appear to move in our night sky.
planets
A ________ is an object that orbits the sun, is large enough to have become ________ by its own gravity, and has cleared the area of its orbit of any _______.
planet, rounded, debris
How many planets are there in our solar system?
8 planets, 5 dwarf planets
A streak of light formed when a meteoroid burns up in the atmosphere
meter
Rock, iron, or ice flying through space
meteoroid
Meteoroid that hits the Earth
meteorite
Dust and ice with a tail
comet
Are comets or meteors more common?
meteors
How does the tail of a comet form?
Gas particles trailing off comet approaches the sun
How often does Halley’s comet reappear?
75 years
What year will we see it again?
2061
A pattern or group of stars that people represent a figure, animal, or object
constellation
What is the connection between Greek and Roman culture and constellations?
Many are named after Greek or Roman mythology
Today, scientists divide the night sky into _______ constellations.
88
Objects in the sky like the moon, other planets, and stars appear to move. What is the difference between their actual motion and their apparent motion?
Reality versus how we perceive it
The position of objects in the sky depends on the ________ of the Earth.
rotation
Stars generally appear to move ________ to _______ throughout a single night.
east to west
