Astronomy and Physics Flashcards
(34 cards)
Astronomy
The study of the universe
Rotation
The spin of a body on its axis
Revolution
The travel of one body around another
Orbit
The path that a body follows around another
Axis
An imaginary line on which the earth spins
Satellite/moon
A natural or artificial body that revolves around a planet
Light-year
The distance light travels in a year
Astronomical Unit
The distance between the Earth and The Sun
Star
A Large object made of gas the produces light & heat by nuclear fusion
Black Hole
An area in space where the force of gravity is so strong that even light cannot escape
Constellation
A group of stars that forms a recognizable shape from our perspective on Earth
Day
One rotation of Earth’s axis
Year
One revolution around the sun
How long does it take for the Moon to orbit the Earth
A Month
What term describes the phase in which less than half of the moon is visible.
Crescent
What term describes the phase in which more than half of the moon is visible.
Gibbous
What celestial object can be referred to as a ‘dirty snowball’
a comet
7.785 x 10^8
778,500,000
1,433,000,000
1.433 x10^9
How long ago did the Big Bang happen
13.7 billion years
When did our solar system form
4.7 billion years ago
What will happen 5 billion years from now
sun will expand into red giant
what will happen to the Sun after it becomes a red giant
It will blow up into a planetary nebula and the remaining core will be a white dwarf
Meteoroid
A small particle from an asteroid or comet orbiting the Sun.
