T Einstein’s Mirage Paul L. Schechter
... academic curiosities, far too unlikely to actually be observed. But in 1979what appeared to be a close pair of virtually identical quasars was observed. Quasars are very bright distant sources, so light from them sometimes passes near galaxies on its way to us. The suspicion that they were the multi ...
... academic curiosities, far too unlikely to actually be observed. But in 1979what appeared to be a close pair of virtually identical quasars was observed. Quasars are very bright distant sources, so light from them sometimes passes near galaxies on its way to us. The suspicion that they were the multi ...
Astronomy 1001
... The Moon Project • Goal: understand how the moon “works” – Measure Lunar month, explain phases, connect actual observations with scientific model ...
... The Moon Project • Goal: understand how the moon “works” – Measure Lunar month, explain phases, connect actual observations with scientific model ...
microwaves - TeacherWeb
... • Shorter microwaves are used for Doppler radar used in weather forecasts. • One microwave can carry 1000 telephone calls. ...
... • Shorter microwaves are used for Doppler radar used in weather forecasts. • One microwave can carry 1000 telephone calls. ...
Active Galactic Nuclei
... • Early radio telescopes found radio emission from stars, nebulae, and some galaxies. • There were also point-like, or star-like, radio sources which varied rapidly these are the `quasi-stellar’ radio sources or quasars. • In visible light quasars appear as points, like stars. ...
... • Early radio telescopes found radio emission from stars, nebulae, and some galaxies. • There were also point-like, or star-like, radio sources which varied rapidly these are the `quasi-stellar’ radio sources or quasars. • In visible light quasars appear as points, like stars. ...
Figures I through VII in Section 1 on the following sheet
... Which spectrum would most likely have been produced by star B from figure X (_3_)? Of stars C and E in figure X, which is more likely to have produced the spectrum in figure II (_4_)? Why (_5_)? Of the stars labeled on figure X: Which two are the two hottest (_6_)? Which are the two brightest (_7_)? ...
... Which spectrum would most likely have been produced by star B from figure X (_3_)? Of stars C and E in figure X, which is more likely to have produced the spectrum in figure II (_4_)? Why (_5_)? Of the stars labeled on figure X: Which two are the two hottest (_6_)? Which are the two brightest (_7_)? ...
Galaxies – Island universes
... • Galaxies form from collisions of proto-galactic clumps in the first billion years or so after the Big Bang • Many have later infalling matter which has been pulled on by nearby mass and thus doesn’t fall straight in. It settles into a rotating disk, arranging itself into a flat, roughly circularly ...
... • Galaxies form from collisions of proto-galactic clumps in the first billion years or so after the Big Bang • Many have later infalling matter which has been pulled on by nearby mass and thus doesn’t fall straight in. It settles into a rotating disk, arranging itself into a flat, roughly circularly ...
Slide 1
... A galaxy is a collection of billions of stars, plus gas and dust, held together by gravity. There are billions of galaxies in the universe. ...
... A galaxy is a collection of billions of stars, plus gas and dust, held together by gravity. There are billions of galaxies in the universe. ...
Astronomy 103 Final review session - Home | UW
... • Many galaxies host supermassive black holes in their centers • Black hole mass many millions of solar masses • Quasars are galaxies where the active galactic nuclei is detected in the radio • In optical, these looked somewhat like stars, hence “Quasi-stellar radio sources” • Now can resolve host g ...
... • Many galaxies host supermassive black holes in their centers • Black hole mass many millions of solar masses • Quasars are galaxies where the active galactic nuclei is detected in the radio • In optical, these looked somewhat like stars, hence “Quasi-stellar radio sources” • Now can resolve host g ...
Forming disk galaxies in magneto-hydro
... In addition, we were for the first time able to predict the expected structure of the magnetic field in a spiral galaxy directly from the initial conditions left behind after the hot Big Bang. It turns out that already an extremely tiny magnetic field left behind by the Big Bang is sufficient to exp ...
... In addition, we were for the first time able to predict the expected structure of the magnetic field in a spiral galaxy directly from the initial conditions left behind after the hot Big Bang. It turns out that already an extremely tiny magnetic field left behind by the Big Bang is sufficient to exp ...
Stars, Galaxies, and the Universe Section 3 Stars, Galaxies, and the
... and are held together by gravity. The center of mass, or barycenter, is somewhere between the two stars. • In star systems that have more than two stars, two stars may revolve rapidly around a common barycenter, while a third star revolves more slowly at a greater distance from the pair. • Astronome ...
... and are held together by gravity. The center of mass, or barycenter, is somewhere between the two stars. • In star systems that have more than two stars, two stars may revolve rapidly around a common barycenter, while a third star revolves more slowly at a greater distance from the pair. • Astronome ...
Word doc - UC-HiPACC - University of California, Santa Cruz
... Some stars end their lives in cataclysmic explosions: spectacular supernovae, which briefly become the most brilliant objects in their home galaxies, visible from millions or even billions of light-years away. Supernovae are of several distinct types, as is evident from their spectra—the graphs astr ...
... Some stars end their lives in cataclysmic explosions: spectacular supernovae, which briefly become the most brilliant objects in their home galaxies, visible from millions or even billions of light-years away. Supernovae are of several distinct types, as is evident from their spectra—the graphs astr ...
Stellar Masses
... • Extinction:-of standard candles in galaxies will also cause inaccuracies It occurs because of matter in interstellar space within the Milky Way and other galaxies. Note:-This effect will be much smaller out of the galactic plane. • No Perfect Standard Candle:-Some of the methods assume peak magnit ...
... • Extinction:-of standard candles in galaxies will also cause inaccuracies It occurs because of matter in interstellar space within the Milky Way and other galaxies. Note:-This effect will be much smaller out of the galactic plane. • No Perfect Standard Candle:-Some of the methods assume peak magnit ...
Galaxies - Where Science Meets Life
... Central bulge with arms extending outward. Lots of gas and dust. Many established stars. ...
... Central bulge with arms extending outward. Lots of gas and dust. Many established stars. ...
Activity 1 - Galaxies
... Telescopes can be designed to detect any type of electromagnetic wave. This advance in technology has allowed astronomers to generate images of objects in space from the visible light, infra-red, radio waves, X-rays and any other electromagnetic waves they emit. Astronomers have learnt a great deal ...
... Telescopes can be designed to detect any type of electromagnetic wave. This advance in technology has allowed astronomers to generate images of objects in space from the visible light, infra-red, radio waves, X-rays and any other electromagnetic waves they emit. Astronomers have learnt a great deal ...
Stars - Robert M. Hazen
... Stars have a history – a beginning and an end 1. Stars (and planets) begin as clouds of dust and gas, called nebulae. 2. Stars radiate heat and light, which come from the energy of nuclear fusion reactions. 3. Planets form like stars, but they are too small to begin nuclear fusion reactions. ...
... Stars have a history – a beginning and an end 1. Stars (and planets) begin as clouds of dust and gas, called nebulae. 2. Stars radiate heat and light, which come from the energy of nuclear fusion reactions. 3. Planets form like stars, but they are too small to begin nuclear fusion reactions. ...
Lecture1-1
... Imaging and spectroscopic surveys in the optical wavelength conducted with a dedicated (専用) 2.5m telescope @ NewMexico.The imaging survey covers 8,423 sq. degree (in red) in 5 bands, and the spectroscopic survey covers 8.032 sq.degree (in green). The spectroscopic survey obtains optical spectra of g ...
... Imaging and spectroscopic surveys in the optical wavelength conducted with a dedicated (専用) 2.5m telescope @ NewMexico.The imaging survey covers 8,423 sq. degree (in red) in 5 bands, and the spectroscopic survey covers 8.032 sq.degree (in green). The spectroscopic survey obtains optical spectra of g ...
Stars and Sun
... Billions of galaxies make up a universe In 1995, the Hubble Space Telescope discovered over 1,500 galaxies in a tiny sector of the sky ...
... Billions of galaxies make up a universe In 1995, the Hubble Space Telescope discovered over 1,500 galaxies in a tiny sector of the sky ...
Hubble Deep Field
The Hubble Deep Field (HDF) is an image of a small region in the constellation Ursa Major, constructed from a series of observations by the Hubble Space Telescope. It covers an area 2.5 arcminutes across, about one 24-millionth of the whole sky, which is equivalent in angular size to a 65 mm tennis ball at a distance of 100 metres. The image was assembled from 342 separate exposures taken with the Space Telescope's Wide Field and Planetary Camera 2 over ten consecutive days between December 18 and December 28, 1995.The field is so small that only a few foreground stars in the Milky Way lie within it; thus, almost all of the 3,000 objects in the image are galaxies, some of which are among the youngest and most distant known. By revealing such large numbers of very young galaxies, the HDF has become a landmark image in the study of the early universe, with the associated scientific paper having received over 900 citations by the end of 2014.Three years after the HDF observations were taken, a region in the south celestial hemisphere was imaged in a similar way and named the Hubble Deep Field South. The similarities between the two regions strengthened the belief that the universe is uniform over large scales and that the Earth occupies a typical region in the Universe (the cosmological principle). A wider but shallower survey was also made as part of the Great Observatories Origins Deep Survey. In 2004 a deeper image, known as the Hubble Ultra-Deep Field (HUDF), was constructed from a few months of light exposure. The HUDF image was at the time the most sensitive astronomical image ever made at visible wavelengths, and it remained so until the Hubble Extreme Deep Field (XDF) was released in 2012.