Great Discoveries in Astronomy and Astrophysics 171.112
... Students are expected to attend the lectures as many interesting points will be made by the professor or your classmates during the lectures. It is even possible that a “Great Discovery” will be made in class and if you are not there you will miss it, not be a coauthor of the discovery paper, and yo ...
... Students are expected to attend the lectures as many interesting points will be made by the professor or your classmates during the lectures. It is even possible that a “Great Discovery” will be made in class and if you are not there you will miss it, not be a coauthor of the discovery paper, and yo ...
From the Everett and Seattle Astronomical
... whatever is behind. Reflection nebulae are clouds of dust which are reflecting the light of a nearby star or stars. Planetary nebulae are shells of gas thrown out by some stars near the end of their lives. Our Sun will probably produce a planetary nebulae in about 5 billion years. They have nothing ...
... whatever is behind. Reflection nebulae are clouds of dust which are reflecting the light of a nearby star or stars. Planetary nebulae are shells of gas thrown out by some stars near the end of their lives. Our Sun will probably produce a planetary nebulae in about 5 billion years. They have nothing ...
Spectroscopy, the Doppler Shift and Masses of Binary Stars
... those on the right by 2.6 . The two pairs are separated by about 208 (13,000 AU separation, 0.16 ly between the two pairs, all about 162 ly distant). Each pair would be about as bright as the quarter moon viewed from the other. ...
... those on the right by 2.6 . The two pairs are separated by about 208 (13,000 AU separation, 0.16 ly between the two pairs, all about 162 ly distant). Each pair would be about as bright as the quarter moon viewed from the other. ...
Unit 1
... – Stars spend most of their lives on the main sequence – Lifetime depends on the star’s mass and luminosity • More luminous stars burn their energy more rapidly than less luminous stars. • High-mass stars are more luminous than low-mass stars • High mass stars are therefore shorter-lived! ...
... – Stars spend most of their lives on the main sequence – Lifetime depends on the star’s mass and luminosity • More luminous stars burn their energy more rapidly than less luminous stars. • High-mass stars are more luminous than low-mass stars • High mass stars are therefore shorter-lived! ...
PH607lec12
... tidal forces from the central black-hole to prevent their formation. They are much too young to have migrated far, but it seems even more improbable that they formed in their current orbits where the tidal forces of the black hole act. This paradox of youth is even more remarkable for stars that are ...
... tidal forces from the central black-hole to prevent their formation. They are much too young to have migrated far, but it seems even more improbable that they formed in their current orbits where the tidal forces of the black hole act. This paradox of youth is even more remarkable for stars that are ...
Archaeology of the Milky Way - Max-Planck
... a well like marbles, and the gas compacted to form the first stars and galaxies. Without the midwifery of the dark matter, there would probably be no galaxies or stars. According to the conventional school of thought, the large galaxies like our Milky Way didn’t form to full size. Rather, there were ...
... a well like marbles, and the gas compacted to form the first stars and galaxies. Without the midwifery of the dark matter, there would probably be no galaxies or stars. According to the conventional school of thought, the large galaxies like our Milky Way didn’t form to full size. Rather, there were ...
1 Astronomical Measurements and Quantities 2 Astronomical Objects
... method. A brief overview of different methods treated through the course to go from very nearby objects to very distant ones. [K],[BM] Galaxy Clusters: Morphological classification. Main properties. Clusters as multicomponent objects and their multivawelenght observations: optical, X-ray, gravitatio ...
... method. A brief overview of different methods treated through the course to go from very nearby objects to very distant ones. [K],[BM] Galaxy Clusters: Morphological classification. Main properties. Clusters as multicomponent objects and their multivawelenght observations: optical, X-ray, gravitatio ...
Chapter 26
... • A telescope that collects and amplifies radio waves is a radio telescope. • Because radio waves have long wavelengths, a radio telescope must be built with a very large objective, usually some form of dish antenna. • Astronomers often build several radio telescopes close together and connect th ...
... • A telescope that collects and amplifies radio waves is a radio telescope. • Because radio waves have long wavelengths, a radio telescope must be built with a very large objective, usually some form of dish antenna. • Astronomers often build several radio telescopes close together and connect th ...
8_StarGalaxiesUniversePP
... Star Clusters larger groupings stars belong to All stars in a cluster formed from the SAME nebula at about the SAME time and are about the SAME distance from Earth Open cluster loose, disorganized, only a few thousand stars Globular cluster large groupings of older stars ...
... Star Clusters larger groupings stars belong to All stars in a cluster formed from the SAME nebula at about the SAME time and are about the SAME distance from Earth Open cluster loose, disorganized, only a few thousand stars Globular cluster large groupings of older stars ...
5-E Galaxy T - McDonald Observatory
... Make your own Galaxy 5-E Lesson Key Introduction The Hubble Space Telescope has revealed a universe full of galaxies, and stunning detailed structures within nearby galaxies. A galaxy is a gravitationally bound system of stars, gas, and dust. They range in size from a few thousand light years to a f ...
... Make your own Galaxy 5-E Lesson Key Introduction The Hubble Space Telescope has revealed a universe full of galaxies, and stunning detailed structures within nearby galaxies. A galaxy is a gravitationally bound system of stars, gas, and dust. They range in size from a few thousand light years to a f ...
Summary: Nuclear burning in stars
... • P2 = a3 (Kepler’s 3rd Law) • Gas, stars closer to center orbit in less time than those farther from center. • Î automatic stretching of any feature into a trailing spiral. • But arms should rapidly wind up and disappear ...
... • P2 = a3 (Kepler’s 3rd Law) • Gas, stars closer to center orbit in less time than those farther from center. • Î automatic stretching of any feature into a trailing spiral. • But arms should rapidly wind up and disappear ...
NASA`s Spitzer Images Out-of-This
... Technology in Pasadena. "Some theories hold that the black hole might quiet down and eventually enter a more dormant state like our Milky Way black hole." The ring around the black hole is bursting with new star formation. An inflow of material toward the central bar of the galaxy is causing the rin ...
... Technology in Pasadena. "Some theories hold that the black hole might quiet down and eventually enter a more dormant state like our Milky Way black hole." The ring around the black hole is bursting with new star formation. An inflow of material toward the central bar of the galaxy is causing the rin ...
Exoplanets for Amateur Astronomers
... partial transit of planet HD 149026b. He also detected partial transits during the next two opportunities, allowing him to produce a composite light curve of an entire event. This new find is now the third transiting exoplanet detected by amateurs.” Although the spectographs needed for Doppler Spect ...
... partial transit of planet HD 149026b. He also detected partial transits during the next two opportunities, allowing him to produce a composite light curve of an entire event. This new find is now the third transiting exoplanet detected by amateurs.” Although the spectographs needed for Doppler Spect ...
Other Galaxies, their Distances, and the Expansion of the Universe
... about 50 galaxies. n This work proved that the Andromeda galaxy was not part of the Milky Way. n Hubble and his staff then measured the redshifts (remember the Doppler Shift) of the galaxies. They were shocked with what they found. n ...
... about 50 galaxies. n This work proved that the Andromeda galaxy was not part of the Milky Way. n Hubble and his staff then measured the redshifts (remember the Doppler Shift) of the galaxies. They were shocked with what they found. n ...
Chapter 21 notes - Clinton Public Schools
... spiral galaxies: bulge in middle and arms that spiral outward, like pinwheel. Most new stars form in these spiral arms elliptical galaxy: like round flattened balls, contains billions of stars, but have little gas and dust between the stars: stars are no longer forming in elliptical galaxies. Irregu ...
... spiral galaxies: bulge in middle and arms that spiral outward, like pinwheel. Most new stars form in these spiral arms elliptical galaxy: like round flattened balls, contains billions of stars, but have little gas and dust between the stars: stars are no longer forming in elliptical galaxies. Irregu ...
- BIO Web of Conferences
... astronomers, the situation has radically changed in 1995, with the first discovery of a planet around a solar-type star. Today, early 2013, we know more than 850 exoplanets around nearby stars, some of them in multiple systems, and over two thousand candidates detected by the Kepler satellite. We no ...
... astronomers, the situation has radically changed in 1995, with the first discovery of a planet around a solar-type star. Today, early 2013, we know more than 850 exoplanets around nearby stars, some of them in multiple systems, and over two thousand candidates detected by the Kepler satellite. We no ...
Ch. 26.5: The Expanding Universe
... A. Expand forever / Galaxies drift apart? OR B. “Big Crunch” – Galaxies collapse into a center? Depends on how much mass there is in the universe … which is in dispute. ...
... A. Expand forever / Galaxies drift apart? OR B. “Big Crunch” – Galaxies collapse into a center? Depends on how much mass there is in the universe … which is in dispute. ...
Section I - General Information Proposal Title: The effect of the group
... Galaxies are collections of hundreds of billions of stars formed out of the gaseous matrix that permeated the early Universe. The observed properties of galaxies are known to depend on their surrounding local environment. However, astronomers are still struggling to understand to what extent galaxy ...
... Galaxies are collections of hundreds of billions of stars formed out of the gaseous matrix that permeated the early Universe. The observed properties of galaxies are known to depend on their surrounding local environment. However, astronomers are still struggling to understand to what extent galaxy ...
extra-terrestrial observatories
... gths of light – inc observe multiple wavelen in ope (HST) was launched The Hubble Space Telesc le tab gest and most adap 1990 and is one of the lar ing over 11,000kg, its space telescopes. Weigh rared camera, ultraviolet instruments include an inf spectrograph, fine guidance sensors, as well as an o ...
... gths of light – inc observe multiple wavelen in ope (HST) was launched The Hubble Space Telesc le tab gest and most adap 1990 and is one of the lar ing over 11,000kg, its space telescopes. Weigh rared camera, ultraviolet instruments include an inf spectrograph, fine guidance sensors, as well as an o ...
Solar System where_are_we
... Earth travels 595 million miles around the sun each year. Its orbit is an ellipse, which is a long oval shape. As it travels around the sun, it also rotates around its own axis. So, even though the sun appears to be moving across the sky, it is our earth that is turning and moving ...
... Earth travels 595 million miles around the sun each year. Its orbit is an ellipse, which is a long oval shape. As it travels around the sun, it also rotates around its own axis. So, even though the sun appears to be moving across the sky, it is our earth that is turning and moving ...
CH29 The Life of a Star
... The Sun is the closest star to Earth and is the center of our solar system. A giant, spinning ball of very hot gas, the Sun is fueled by nuclear fusion reactions. The light from the Sun heats our world and makes life possible. The Sun is also an active star that displays sunspots, ...
... The Sun is the closest star to Earth and is the center of our solar system. A giant, spinning ball of very hot gas, the Sun is fueled by nuclear fusion reactions. The light from the Sun heats our world and makes life possible. The Sun is also an active star that displays sunspots, ...
The night sky in October and November
... Messier. M31 is a Messier object. Time-elapse photos through a large telescope reveal it as a spiral galaxy about four times the width of the full moon. It is the most distant object you can see without optical aids. The stars that make up the constellation of Andromeda are in the Milky Way. That’s ...
... Messier. M31 is a Messier object. Time-elapse photos through a large telescope reveal it as a spiral galaxy about four times the width of the full moon. It is the most distant object you can see without optical aids. The stars that make up the constellation of Andromeda are in the Milky Way. That’s ...
A Star is “Born,” and then How Will it Move
... Young (Embedded) Clusters: Very young (<10 Myr-old) groups of young stars that form together. Future binding depends on cluster mass & velocity, seems that 90% dissolve before ~10 Myr (Lada & Lada 2003). When they unbind but are still seen to move together, they’re known as a “stellar association.” ...
... Young (Embedded) Clusters: Very young (<10 Myr-old) groups of young stars that form together. Future binding depends on cluster mass & velocity, seems that 90% dissolve before ~10 Myr (Lada & Lada 2003). When they unbind but are still seen to move together, they’re known as a “stellar association.” ...
Space Interferometry Mission
The Space Interferometry Mission, or SIM, also known as SIM Lite (formerly known as SIM PlanetQuest), was a planned space telescope developed by the U.S. National Aeronautics and Space Administration (NASA), in conjunction with contractor Northrop Grumman. One of the main goals of the mission was the hunt for Earth-sized planets orbiting in the habitable zones of nearby stars other than the Sun. SIM was postponed several times and finally cancelled in 2010.In addition to hunting for extrasolar planets, SIM would have helped astronomers construct a map of the Milky Way galaxy. Other important tasks would have included collecting data to help pinpoint stellar masses for specific types of stars, assisting in the determination of the spatial distribution of dark matter in the Milky Way and in the Local Group of galaxies and using the gravitational microlensing effect to measure the mass of stars.The spacecraft would have used optical interferometry to accomplish these and other scientific goals. This technique collects light with multiple mirrors (in SIM's case, two) which is combined to make an interference pattern which can be very precisely measured.The initial contracts for SIM Lite were awarded in 1998, totaling US$200 million. Work on the SIM project required scientists and engineers to move through eight specific new technology milestones, and by November 2006, all eight had been completed.SIM Lite was originally scheduled for a 2005 launch, aboard an Evolved Expendable Launch Vehicle (EELV). As a result of continued budget cuts, the launch date has been pushed back at least five times. NASA has set a preliminary launch date for 2015 and U.S. federal budget documents confirm that a launch date is expected ""no earlier"" than 2015. The budget cuts to SIM Lite are expected to continue through FY 2010. As of February 2007, many of the engineers working on the SIM program had moved on to other areas and projects, and NASA directed the project to allocate its resources toward engineering risk reduction. However, the preliminary budget for NASA for 2008 included zero dollars for SIM.In December 2007, the Congress restored funding for fiscal year 2008 as part of an omnibus appropriations bill which the President later signed. At the same time the Congress directed NASA to move the mission forward to the development phase. In 2009 the project continued its risk reduction work while waiting for the findings and recommendations of the Astronomy and Astrophysics Decadal Survey, Astro2010, performed by the National Academy of Sciences, which would determine the project's future.On 13 August 2010, the Astro2010 Decadal Report was released and did not recommend that NASA continue the development of the SIM Lite Astrometric Observatory. This prompted NASA Astronomy and Physics Director, Jon Morse, to issue a letter on 24 September 2010 to the SIM Lite project manager, informing him that NASA was discontinuing its sponsorship of the SIM Lite mission and directing the project to discontinue Phase B activities immediately or as soon as practical. Accordingly, all SIM Lite activities were closed down by the end of calendar year 2010.