Stars and Light
... `magnitude’ groups according to how bright they looked to his eye. • Herschel (1800s) first measured the brightness of stars quantitatively and matched his measurements onto Ptolemy’s magnitude groups and assigned a number for the magnitude of each star. ...
... `magnitude’ groups according to how bright they looked to his eye. • Herschel (1800s) first measured the brightness of stars quantitatively and matched his measurements onto Ptolemy’s magnitude groups and assigned a number for the magnitude of each star. ...
Supernovae March 23 − Supernova 1987A
... period Chih-ho, …, a guest star appeared several degrees SE of Thien-kuan. After more than a year it gradually became invisible.−p564. ...
... period Chih-ho, …, a guest star appeared several degrees SE of Thien-kuan. After more than a year it gradually became invisible.−p564. ...
Lab 6
... • This is somewhat tricky: while keeping the axes pointed in the right direction (in other words, without rotating the sheet), slide the transparency over the other graph until the pattern of points on the transparency nearly or exactly matches the pattern of points on the underlying graph (in other ...
... • This is somewhat tricky: while keeping the axes pointed in the right direction (in other words, without rotating the sheet), slide the transparency over the other graph until the pattern of points on the transparency nearly or exactly matches the pattern of points on the underlying graph (in other ...
Module code: AA1
... 3 stars (Sirius A, Alpha Centauri A and Procyon) appear on both lists. They are very close to the earth and for that reason their below average luminosity is sufficient to make them appear on the list of the 20 brightest stars. The sample group of the nearest stars is more representative than the gr ...
... 3 stars (Sirius A, Alpha Centauri A and Procyon) appear on both lists. They are very close to the earth and for that reason their below average luminosity is sufficient to make them appear on the list of the 20 brightest stars. The sample group of the nearest stars is more representative than the gr ...
Shining Light on the Stars: The Hertzsprung-Russell
... The stars Castor and Pollux form the heads of the Gemini twins. They appear to be about the same brightness but clearly show different colors. Castor appears bluish/white and is actually a binary star composed of two nearly identical stars. In contrast, Pollux has a noticeably orange tint correspon ...
... The stars Castor and Pollux form the heads of the Gemini twins. They appear to be about the same brightness but clearly show different colors. Castor appears bluish/white and is actually a binary star composed of two nearly identical stars. In contrast, Pollux has a noticeably orange tint correspon ...
stars-notes
... Composition of Stars, continued • A continuous spectrum shows all of the colors, while an absorption spectrum shows which wavelengths of light are absorbed. • The spectrum of a star is an absorption spectrum because the atmosphere of the star absorbs certain portions of the light produced by the sta ...
... Composition of Stars, continued • A continuous spectrum shows all of the colors, while an absorption spectrum shows which wavelengths of light are absorbed. • The spectrum of a star is an absorption spectrum because the atmosphere of the star absorbs certain portions of the light produced by the sta ...
Globular Clusters - Lick Observatory
... •Globular Clusters + Telescopes •CCDs + Data Reduction •Stellar Evolution of Low Mass Stars •Isochrones and CMD Diagrams ...
... •Globular Clusters + Telescopes •CCDs + Data Reduction •Stellar Evolution of Low Mass Stars •Isochrones and CMD Diagrams ...
Linking Asteroids and Meteorites through Reflectance
... • The temperatures of high-mass stars in its latestage of life can reach temperatures above 600 million Kelvin • Can fuse Carbon and heavier elements • Helium Capture can also occur where Helium can be fused into heavy elements ...
... • The temperatures of high-mass stars in its latestage of life can reach temperatures above 600 million Kelvin • Can fuse Carbon and heavier elements • Helium Capture can also occur where Helium can be fused into heavy elements ...
Cassiopeia (constellation)
Cassiopeia is a constellation in the northern sky, named after the vain queen Cassiopeia in Greek mythology, who boasted about her unrivalled beauty. Cassiopeia was one of the 48 constellations listed by the 2nd-century Greek astronomer Ptolemy, and it remains one of the 88 modern constellations today. It is easily recognizable due to its distinctive 'M' shape when in upper culmination but in higher northern locations when near lower culminations in spring and summer it has a 'W' shape, formed by five bright stars. It is bordered by Andromeda to the south, Perseus to the southeast, and Cepheus to the north. It is opposite the Big Dipper.In northern locations above 34ºN latitude it is visible year-round and in the (sub)tropics it can be seen at its clearest from September to early November in its characteristic 'M' shape. Even in low southern latitudes below 25ºS is can be seen low in the North.