astronomy Flashcards
(20 cards)
Who proposed a geocentric model of the universe?
Ptolemy: Ancient Greek astronomer who proposed a geocentric model of the universe.
Who developed the heliocentric model of the solar system?
Copernicus: Polish astronomer who developed the heliocentric model of the solar system.
Who is known for accurate astronomical observations?
Brahe, Tycho: Danish nobleman and astronomer known for his accurate astronomical observations.
Who formulated the laws of planetary motion?
Kepler, Johannes: German astronomer who formulated the laws of planetary motion.
Who made significant telescopic discoveries?
Galileo: Italian astronomer and physicist who made significant telescopic discoveries.
Who formulated the laws of motion and universal gravitation?
Newton, Isaac: English scientist who formulated the laws of motion and universal gravitation.
Who established the expansion of the universe?
Hubble, Edwin: American astronomer who established the expansion of the universe.
What is Ursa Major?
Ursa Major: A large constellation visible in the Northern Hemisphere, famous for its asterism, the Big Dipper.
What is Ursa Minor known for?
Ursa Minor: A constellation in the Northern Sky, notable for containing Polaris, the North Star.
What is Orion?
Orion: A prominent constellation located on the celestial equator, easily recognizable by its three bright stars forming Orion’s Belt.
What is Canis Major known for?
Canis Major: A constellation known for containing Sirius, the brightest star in the night sky.
What shape is the constellation Cassiopeia?
Cassiopeia: A distinctive W-shaped constellation in the northern sky.
What is a Red Giant?
Red Giant: A dying star in a late stage of stellar evolution that has expanded and cooled significantly.
What is a White Dwarf?
White Dwarf: The very dense and hot remnant core of a star after it has shed its outer layers.
What is a Main-sequence star?
Main-sequence star: A star that is fusing hydrogen into helium in its core, like our Sun.
What is a Supernova?
Supernova: A powerful and luminous stellar explosion.
What is a Black hole?
Black hole: A region of spacetime where gravity is so strong that nothing, not even light, can escape.
What is Parallax?
Parallax: The apparent displacement or difference in the apparent position of an object viewed from different lines of sight.
What is a Light-year?
Light-year: A unit of distance used in astronomy, representing the distance light travels in one Earth year.
What is Polaris?
Polaris: Also known as the North Star, it is the brightest star in the constellation Ursa Minor and is very close to the north celestial pole.
