Interstellar medium, birth and life of stars
... RR Lyrae variables are low-mass, pulsating variables with short periods. Cepheid variables are high-mass, pulsating variables exhibiting a regular relationship between the period of pulsation and luminosity. Mass can be transferred from one star to another in close binary systems. When this occu ...
... RR Lyrae variables are low-mass, pulsating variables with short periods. Cepheid variables are high-mass, pulsating variables exhibiting a regular relationship between the period of pulsation and luminosity. Mass can be transferred from one star to another in close binary systems. When this occu ...
Stars III The Hertzsprung
... Note: there is another measure of stellar luminosity called Absolute Magnitude. We are not learning about it in this class, and you are not responsible to know about it. For the LT, answer questions about the Absolute Magnitude using the diagrams, but ...
... Note: there is another measure of stellar luminosity called Absolute Magnitude. We are not learning about it in this class, and you are not responsible to know about it. For the LT, answer questions about the Absolute Magnitude using the diagrams, but ...
galctr
... --How did such apparently young stars come to be found in an environment where SF is so difficult? --Same, but more extreme version of question for He I emission-line stars at 0.1 -0.5 pc from ctr. --Would need n > 1014 cm-3 at R=0.01 pc; n> 108 cm-3 at R=0.1 pc to form in situ given strong tidal gr ...
... --How did such apparently young stars come to be found in an environment where SF is so difficult? --Same, but more extreme version of question for He I emission-line stars at 0.1 -0.5 pc from ctr. --Would need n > 1014 cm-3 at R=0.01 pc; n> 108 cm-3 at R=0.1 pc to form in situ given strong tidal gr ...
Night Sky
... Constellations were originally a game of “connect the dots” of humans finding patterns in the sky The constellations named within Western culture originated in Mesopotamia, Babylon, Egypt, and Greece beginning as much as 5,000 years ago. Colloquially, groups of stars that appear to form patterns in ...
... Constellations were originally a game of “connect the dots” of humans finding patterns in the sky The constellations named within Western culture originated in Mesopotamia, Babylon, Egypt, and Greece beginning as much as 5,000 years ago. Colloquially, groups of stars that appear to form patterns in ...
Multiple Choice, continued Stars, Galaxies, and the Universe
... that light travels through space in 1 year. Because the speed of light through space is about 300,000 km/ s, light travels approximately 9.46 trillion kilometers in one year. Even after astronomers figured out that stars were far from Earth, the nature of the universe was hard to understand. Some as ...
... that light travels through space in 1 year. Because the speed of light through space is about 300,000 km/ s, light travels approximately 9.46 trillion kilometers in one year. Even after astronomers figured out that stars were far from Earth, the nature of the universe was hard to understand. Some as ...
The Sky Viewed from Earth - Beck-Shop
... (47 at most, i.e. about 3 h of observing time). Look for it in the east before sunrise or in the west after sunset. At maximum brightness it is a spectacular object – the brightest in the night sky after the Moon. Mars, Jupiter, and Saturn, whose orbits are outside the Earth’s, can appear at any ti ...
... (47 at most, i.e. about 3 h of observing time). Look for it in the east before sunrise or in the west after sunset. At maximum brightness it is a spectacular object – the brightest in the night sky after the Moon. Mars, Jupiter, and Saturn, whose orbits are outside the Earth’s, can appear at any ti ...
Stellar Evolution
... 18. What does the core of a star at the end of being a main sequence star look like ? ...
... 18. What does the core of a star at the end of being a main sequence star look like ? ...
The Scales of Things
... Cepheids Cepheid variable stars are pulsating stars, named after the brightest member of the class, Delta Cephei. Cepheids are brightest when they are hottest, close to the minimum size. Since all Cepheids are about the same temperature, the size of a Cepheid determines its luminosity. Thus ther ...
... Cepheids Cepheid variable stars are pulsating stars, named after the brightest member of the class, Delta Cephei. Cepheids are brightest when they are hottest, close to the minimum size. Since all Cepheids are about the same temperature, the size of a Cepheid determines its luminosity. Thus ther ...
Supernovas 10/19
... Supernova 2014j – Jan 2014 In M82 (Ursa Major). Type Ia. Closest of this type observed in modern times. 11.5 million LY away. Discovered at undergrad session Univ Coll London (SN1972 e was 11 MLY but pre “modern”) ...
... Supernova 2014j – Jan 2014 In M82 (Ursa Major). Type Ia. Closest of this type observed in modern times. 11.5 million LY away. Discovered at undergrad session Univ Coll London (SN1972 e was 11 MLY but pre “modern”) ...
Star Maps - Astronomy Outreach - The University of Texas at Austin
... o When does the star map most accurately represent the sky? -Refer to the dates and times listed on the side of the map. (NOTE: The cardinal directions (north, south, east, west) are listed around the edge of the circle so that you can hold the map up towards the corresponding horizon and see which ...
... o When does the star map most accurately represent the sky? -Refer to the dates and times listed on the side of the map. (NOTE: The cardinal directions (north, south, east, west) are listed around the edge of the circle so that you can hold the map up towards the corresponding horizon and see which ...
All_Stars
... energy into thermal energy and heats up. The pressure in the gas increases as the particles in the gas move faster and faster in random directions. This pressure will push outwards against the gravitational forces. At the same time the gas cloud will be losing thermal energy through radiation so thi ...
... energy into thermal energy and heats up. The pressure in the gas increases as the particles in the gas move faster and faster in random directions. This pressure will push outwards against the gravitational forces. At the same time the gas cloud will be losing thermal energy through radiation so thi ...
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.