Milky Way Galaxy
... • Theory that the universe began as a point and has been expanding ever since – Thought to have begun as an infinitesimally small, hot, and dense “singularity”. – About 14 (13.7) billion years ago ...
... • Theory that the universe began as a point and has been expanding ever since – Thought to have begun as an infinitesimally small, hot, and dense “singularity”. – About 14 (13.7) billion years ago ...
stars - Legacy High School
... 18. When nuclear fusion is occurring in a star, the element_____________ fuses to form______________. 19. When objects are moving away, the spectrum lines are displaced toward longer wavelengths of light, this is called a ______________shift. 20. When objects are toward earth, the spectrum lines are ...
... 18. When nuclear fusion is occurring in a star, the element_____________ fuses to form______________. 19. When objects are moving away, the spectrum lines are displaced toward longer wavelengths of light, this is called a ______________shift. 20. When objects are toward earth, the spectrum lines are ...
File
... material (mostly H and He) within a spiral arm of the milky way galaxy began to contract and flatten into a rotating disk Disk rotated and most of the mass concentrated in the center Surrounding the central disk, the turbulent rotating nebula of interstellar gases began to cool and condense, forming ...
... material (mostly H and He) within a spiral arm of the milky way galaxy began to contract and flatten into a rotating disk Disk rotated and most of the mass concentrated in the center Surrounding the central disk, the turbulent rotating nebula of interstellar gases began to cool and condense, forming ...
Chapter 30
... 4. Which type of star is most likely to be found on the main sequence? F. a white dwarf G. a red supergiant H. a yellow star I. a neutron star ...
... 4. Which type of star is most likely to be found on the main sequence? F. a white dwarf G. a red supergiant H. a yellow star I. a neutron star ...
LT 9: I can describe how a protostar becomes a star.
... explosion (supernova); everything except the star’s core is blown out into space – What is left of the core becomes a very dense, invisible ...
... explosion (supernova); everything except the star’s core is blown out into space – What is left of the core becomes a very dense, invisible ...
characteristics of stars
... the disk. In the central bulge, the stars are so numerous that they appear very close even though they are separated by large distance. Most of the stars outside the bulge are arranged in long ____________, called _________ which curve around the bulge. The entire Milky Way rotates around this bulge ...
... the disk. In the central bulge, the stars are so numerous that they appear very close even though they are separated by large distance. Most of the stars outside the bulge are arranged in long ____________, called _________ which curve around the bulge. The entire Milky Way rotates around this bulge ...
Stars and Their Characteristics
... measure star distance • The nearest stars have the largest parallax angles, while those of distant stars are too small to measure ...
... measure star distance • The nearest stars have the largest parallax angles, while those of distant stars are too small to measure ...
Section 25.2 Stellar Evolution
... Stars less than one-half the mass of the sun never evolve to the red giant stage but remain in the stable main-sequence stage until they consume all their hydrogen fuel and collapse into a white dwarf. Death of Medium-Mass Stars Stars with masses similar to the sun evolve in essentially the same ...
... Stars less than one-half the mass of the sun never evolve to the red giant stage but remain in the stable main-sequence stage until they consume all their hydrogen fuel and collapse into a white dwarf. Death of Medium-Mass Stars Stars with masses similar to the sun evolve in essentially the same ...
PowerPoint - Chandra X
... NGC 7027: A young planetary nebula about 3,000 light years from Earth in the constellation Cygnus. Chandra’s image of NGC 7027 represents the first detection of X-rays from this young planetary nebula that is about 700 years old. A bubble of 3 million degree Celsius gas with a length about a hundred ...
... NGC 7027: A young planetary nebula about 3,000 light years from Earth in the constellation Cygnus. Chandra’s image of NGC 7027 represents the first detection of X-rays from this young planetary nebula that is about 700 years old. A bubble of 3 million degree Celsius gas with a length about a hundred ...
SISTERS OF THE SUN
... 4. Pickering’s “Computers” mapped and ____________________ the stars. • Annie Jump ____________________ was the leader of the team. • Henrietta Swan Leavitt discovered the law astronomers use to measure 5. English astronomer Cecilia Payne had to emigrate to ______________________________ in order to ...
... 4. Pickering’s “Computers” mapped and ____________________ the stars. • Annie Jump ____________________ was the leader of the team. • Henrietta Swan Leavitt discovered the law astronomers use to measure 5. English astronomer Cecilia Payne had to emigrate to ______________________________ in order to ...
Stars - etpt2020s11
... tars are gaseous masses found in the sky. They range in size and brightness. Each star is classified by their spectra and temperature. Some stars are noted on an individual basis, while others stars are know by their participation in a constellation. Whether a star is large or small, dull or bright, ...
... tars are gaseous masses found in the sky. They range in size and brightness. Each star is classified by their spectra and temperature. Some stars are noted on an individual basis, while others stars are know by their participation in a constellation. Whether a star is large or small, dull or bright, ...
Ch 29 Sun and Solar Activity
... atmosphere, disrupt longrange radios, satell. & radar • solar flame animation ...
... atmosphere, disrupt longrange radios, satell. & radar • solar flame animation ...
Day 9 - Ch. 4 -
... • Debris and remnants in the solar system. • Extrasolar planets (outside the solar system). ...
... • Debris and remnants in the solar system. • Extrasolar planets (outside the solar system). ...
The Milky Way - Clive Gifford
... The Milky Way is part of a cluster, or collection, of galaxies known as the Local Group. These include Andromeda, the Triangulam galaxy and Canis Major Dwarf as well as a further 40 galaxies, some of which have only recently been discovered. The Local Group has a diameter of about 10 million light y ...
... The Milky Way is part of a cluster, or collection, of galaxies known as the Local Group. These include Andromeda, the Triangulam galaxy and Canis Major Dwarf as well as a further 40 galaxies, some of which have only recently been discovered. The Local Group has a diameter of about 10 million light y ...
Astronomy
... The brightest stars have the lowest number The dimmest stars have the highest number ...
... The brightest stars have the lowest number The dimmest stars have the highest number ...
Review 1 Solutions
... 6. A quasar with a redshift of one (z = 1) is receding from us at the speed of light. F 7. Cepheid variable stars and Type Ia supernovae are examples of “standard candles” which have a known luminosity and thereby allow astronomers to determine precise distances to galaxies outside our own. T ...
... 6. A quasar with a redshift of one (z = 1) is receding from us at the speed of light. F 7. Cepheid variable stars and Type Ia supernovae are examples of “standard candles” which have a known luminosity and thereby allow astronomers to determine precise distances to galaxies outside our own. T ...
Gravitational potential energy
... Question: The Milky Way galaxy has about 5e9 solar masses of gas in total. If 2 solar masses of that gas is turned into stars each year, how many more years could the Milky Way keep up with such a star formation rate? ...
... Question: The Milky Way galaxy has about 5e9 solar masses of gas in total. If 2 solar masses of that gas is turned into stars each year, how many more years could the Milky Way keep up with such a star formation rate? ...
White Dwarfs - Astronomy - The University of Texas at Austin
... is still here 10-100 billion of them (~ 100 billion stars total) Most are dim, undiscovered, see only those nearby, none naked eye Sirius, brightest star in the sky, has a white dwarf companion. Can’t see the white dwarf with the naked eye, too small, dim, but Sirius is easy if you look for it at th ...
... is still here 10-100 billion of them (~ 100 billion stars total) Most are dim, undiscovered, see only those nearby, none naked eye Sirius, brightest star in the sky, has a white dwarf companion. Can’t see the white dwarf with the naked eye, too small, dim, but Sirius is easy if you look for it at th ...
Ch. 13 GALAXIES
... A. ___________ galaxies – “normal” galaxies undergoing aggressive star formation due to interactions Ex/ M82 – The ______ Galaxy B. ____________ galaxies – resemble spirals, but with very energetic galactic _________ Ex/ NGC 7742 “Fried Egg” C. ______ galaxies – gigantic radio ______ on each side of ...
... A. ___________ galaxies – “normal” galaxies undergoing aggressive star formation due to interactions Ex/ M82 – The ______ Galaxy B. ____________ galaxies – resemble spirals, but with very energetic galactic _________ Ex/ NGC 7742 “Fried Egg” C. ______ galaxies – gigantic radio ______ on each side of ...
doc - IAC
... composition of those regions. There are likewise some elements that are formed inside the stars that produce planetary nebulae. In a nebula we can see the signature of the element’s formation, which gives us a better idea of the nucleosynthesis in all those stars.’ But planetary nebulae harbour much ...
... composition of those regions. There are likewise some elements that are formed inside the stars that produce planetary nebulae. In a nebula we can see the signature of the element’s formation, which gives us a better idea of the nucleosynthesis in all those stars.’ But planetary nebulae harbour much ...
Class notes 2 - University of Texas Astronomy
... Example: the distance between the Sun and the center of the Galaxy is 8000 = 8 x 103 = 8kpc. (kpc = kiloparsecs) Contents of the Universe Nearest 50 AU The astronomical unit (1 AU) is the semi-major axis of the Earth's orbit around the Sun (mean Earth-Sun distance = 150 × 106km). For us, semi-major ...
... Example: the distance between the Sun and the center of the Galaxy is 8000 = 8 x 103 = 8kpc. (kpc = kiloparsecs) Contents of the Universe Nearest 50 AU The astronomical unit (1 AU) is the semi-major axis of the Earth's orbit around the Sun (mean Earth-Sun distance = 150 × 106km). For us, semi-major ...
H II region
An H II region is a large, low-density cloud of partially ionized gas in which star formation has recently taken place. The short-lived blue stars forged in these regions emit copious amounts of ultraviolet light that ionize the surrounding gas. H II regions—sometimes several hundred light-years across—are often associated with giant molecular clouds. The first known H II region was the Orion Nebula, which was discovered in 1610 by Nicolas-Claude Fabri de Peiresc.H II regions are named for the large amount of ionised atomic hydrogen they contain, referred to as H II, pronounced H-two by astronomers (an H I region being neutral atomic hydrogen, and H2 being molecular hydrogen). Such regions have extremely diverse shapes, because the distribution of the stars and gas inside them is irregular. They often appear clumpy and filamentary, sometimes showing bizarre shapes such as the Horsehead Nebula. H II regions may give birth to thousands of stars over a period of several million years. In the end, supernova explosions and strong stellar winds from the most massive stars in the resulting star cluster will disperse the gases of the H II region, leaving behind a cluster of birthed stars such as the Pleiades.H II regions can be seen to considerable distances in the universe, and the study of extragalactic H II regions is important in determining the distance and chemical composition of other galaxies. Spiral and irregular galaxies contain many H II regions, while elliptical galaxies are almost devoid of them. In the spiral galaxies, including the Milky Way, H II regions are concentrated in the spiral arms, while in the irregular galaxies they are distributed chaotically. Some galaxies contain huge H II regions, which may contain tens of thousands of stars. Examples include the 30 Doradus region in the Large Magellanic Cloud and NGC 604 in the Triangulum Galaxy.