Astronomy Flashcards
(20 cards)
Ptolemy
Believed that earth was the center of the universe and all the planets including the sun revolved around it.
Copernicus
Believed that the sun is the center of all the universe and all the planets revolved around the sun
Brahe, Tycho
A scientist that recorded very precise observations on the planets and the stars.
Kepler, Johannes
A scientist who used Brahe’s work to determine that all the planets revolve around the sun in elliptical orbits
Galileo
Used a telescope to make important discoveries about the moon and the sun
Newton, Isaac
A scientist who discovered that all objects in the universe attract each other
Hubble, Edwin
Proved that other galaxy exist beyond our galaxy
Ursa major
Ursa Major is a constellation in the northern sky, whose associated mythology likely dates back into prehistory.
Ursa minor
a constellation located in the far northern sky.
Orion
constellation located on the celestial equator and visible throughout the world. It is one of the most conspicuous and recognizable constellations
Canis major
a constellation in the southern celestial hemisphere.
Cassiopeia
a constellation in the northern sky named after the vain queen Cassiopeia
Red giant
a luminous giant star of low or intermediate mass in a late phase of stellar evolution
White dwarf
is a stellar core remnant composed mostly of electron-degenerate matter. A white dwarf is very dense
Main-sequence star
any star that has a hot, dense core which fuses hydrogen into helium to produce energy
Supernova
A supernova is the colossal explosion of a star
Black hole
a region of spacetime where gravity is so strong that nothing, including light or other electromagnetic waves, has enough energy to escape its event horizon
Parallax
the apparent displacement or the difference in apparent direction of an object as seen from two different points not on a straight line with the object
Light-year
the distance light travels in one year
Polaris
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