astronomy

proposed a geocentric system of astronomy that was undisputed until the late Renaissance

Renaissance-era mathematician and astronomer who formulated a model of the universe that placed the Sun rather than the Earth at the center of the universe

Danish astronomer whose observations of the planets provided the basis for Kepler’s laws of planetary motion

German astronomer and mathematician who is considered the founder of celestial mechanics

Italian astronomer and mathematician who was the first to use a telescope to study the stars

English mathematician and physicist; remembered for developing the calculus and for his law of gravitation and his three laws of motion

played a crucial role in establishing the fields of extragalactic astronomy and observational cosmology

a constellation that is the most conspicuous of the northern constellations

It was one of the 48 constellations listed by the 2nd-century astronomer Ptolemy

prominent constellation located on the celestial equator and visible throughout the world

a constellation in the S hemisphere close to Orion, containing Sirius, the brightest star in the sky Also called the Great Dog

a constellation in the northern sky, named after the vain queen Cassiopeia in Greek mythology

a very large star of high luminosity and low surface temperature

a small very dense star that is typically the size of a planet. A white dwarf is formed when a low-mass star has exhausted all its central nuclear fuel and lost its outer layers as a planetary nebula

fusing hydrogen in its core and has a stable balance of outward pressure from core nuclear fusion and gravitational forces pushing inward

a star that suddenly increases greatly in brightness because of a catastrophic explosion that ejects most of its mass

a region of space having a gravitational field so intense that no matter or radiation can escape

the effect whereby the position or direction of an object appears to differ when viewed from different positions, e.g., through the viewfinder and the lens of a camera

a unit of astronomical distance equivalent to the distance that light travels in one year

A star located at the end of the handle of the Little Dipper, in the constellation Ursa Minor, approximately 408 light years from Earth, and almost at the north celestial pole