chapter 18 astronomy Flashcards
(20 cards)
Light-year
the distance that light travels in one year, about 9,46 trillion kilometers
Polaris star
Polaris is a star in the northern circumpolar constellation of Ursa Minor
parallax
an apperant shift in the position of an object when viewed from different locations
black hole
an object so massive and dense that even light cannot escape its gravity
supernova
A supernova is a powerful and luminous stellar explosion
main-sequence star
In astronomy, the main sequence is a continuous and distinctive band of stars that appears on plots of stellar color versus brightness
white dwarf
A white dwarf is what stars like the Sun become after they have exhausted their nuclear fuel
red giant
A red giant is a luminous giant star of low or intermediate mass
Cassiopeia
Cassiopeia is a constellation in the northern sky named after the vain queen Cassiopeia, mother of Andromeda, in Greek mythology, who boasted about her unrivaled beauty
canis major
Canis Major, (Latin: “Greater Dog”) constellation in the southern sky, at about 7 hours right ascension and 20° south in declination
Orion
Orion is a prominent constellation located on the celestial equator and visible throughout the world
Ursa major
Ursa Major is a constellation in the northern sky, whose associated mythology likely dates back into prehistory.
Ursa Minor
Ursa Minor, (Latin: “Lesser Bear”) also called the Little Bear, in astronomy, is a constellation of the northern sky, at about 15 hours right ascension and 80° north declination, and seven of whose stars outline the Little Dipper.
Edwin Hubble
Edwin Powell Hubble was an American astronomer. He played a crucial role in establishing the fields of extragalactic astronomy and observational cosmology.
newton Isaac
Sir Isaac Newton PRS was an English mathematician, physicist, astronomer, theologian, and author who is widely recognized as one of the greatest mathematicians, physicists, and most influential scientists of all time
galileo
Galileo di Vincenzo Bonaiuti de’ Galilei was an Italian astronomer, physicist, and engineer, sometimes described as a polymath, from Pisa. Galileo has been called the “father of observational astronomy”, the “father of modern physics”, the “father of the scientific method”, and the “father of modern science”
Johannes Kepler
Johannes Kepler was a German mathematician, astronomer, astrologer, and natural philosopher. He is a key figure in the 17th-century Scientific Revolution, best known for his laws of planetary motion, and his books Astronomia nova, Harmonice Mundi, and Epitome Astronomiae Copernicanae
Tycho Brahe
Tycho Brahe was a Danish astronomer, known for his accurate and comprehensive astronomical observations. He was born in the then-Danish peninsula of Scania, which became part of Sweden the century afterward. Tycho was well known in his lifetime as an astronomer, astrologer, and alchemist.
Copernicus
Nicolaus Copernicus was a Renaissance polymath, active as a mathematician, astronomer, and Catholic canon, who formulated a model of the universe that placed the Sun rather than Earth at its center.
Ptolemy
Claudius Ptolemy was a mathematician, astronomer, geographer, and astrologer who wrote about a dozen scientific treatises, three of which were of importance to later Byzantine, Islamic, and Western European science
