December 2015
... The Horsehead Nebula in Orion is the most famous. Emission nebulae are clouds of ionized high temperature gas. There are many huge examples, the gigantic Lagoon Nebula (M8) in Sagittarius. This constellation also includes the Swan or Omega Nebula (M17) and the Trifid Nebula (M20). Nearby is the Eagl ...
... The Horsehead Nebula in Orion is the most famous. Emission nebulae are clouds of ionized high temperature gas. There are many huge examples, the gigantic Lagoon Nebula (M8) in Sagittarius. This constellation also includes the Swan or Omega Nebula (M17) and the Trifid Nebula (M20). Nearby is the Eagl ...
Galaxies
... protogalactic clouds that were able to cool and form stars before gas settled into a disk ...
... protogalactic clouds that were able to cool and form stars before gas settled into a disk ...
Intro To The Solar System
... Earth has diameter 0.3 mm. Sun: ~ size of a small plum. Mercury, Venus, Earth, Mars: ~ size of a grain of salt. Jupiter: ~ size of an apple seed. Saturn: ~ slightly smaller than Jupiter’s “apple seed”. ...
... Earth has diameter 0.3 mm. Sun: ~ size of a small plum. Mercury, Venus, Earth, Mars: ~ size of a grain of salt. Jupiter: ~ size of an apple seed. Saturn: ~ slightly smaller than Jupiter’s “apple seed”. ...
Teaching astrophysics in VCE Physics
... $ However, most stars are too far away to measure their distance by parallax. If we could find the luminosity of a star by some means not involving its distance, then we could turn things around and find the distance from its apparent brightness. Later we will see that there is a way to find the lum ...
... $ However, most stars are too far away to measure their distance by parallax. If we could find the luminosity of a star by some means not involving its distance, then we could turn things around and find the distance from its apparent brightness. Later we will see that there is a way to find the lum ...
Microsoft Power Point version
... Don’t worry..you won’t have do this math.. . So, is there any way we can find the mass of a star like Deneb? ...
... Don’t worry..you won’t have do this math.. . So, is there any way we can find the mass of a star like Deneb? ...
Catching Andromeda`s Light
... Andromeda’s spiral arms, he thought they might also trace the Milky Way’s spiral arms. So in 1951, Morgan mapped the locations of all the red clouds of gas he and his colleagues could find. He discovered that the gas clouds lined up along spiral arms, indicating that we live in a spiral galaxy. Why ...
... Andromeda’s spiral arms, he thought they might also trace the Milky Way’s spiral arms. So in 1951, Morgan mapped the locations of all the red clouds of gas he and his colleagues could find. He discovered that the gas clouds lined up along spiral arms, indicating that we live in a spiral galaxy. Why ...
Our Local Group of Galaxies
... Proximity of Local Group galaxies means that they can be studied in much greater detail than more distant systems. In particular, can study individual stars in all Local Group galaxies, allowing direct inferences on properties such as star formation histories, chemical abundances and so on. ...
... Proximity of Local Group galaxies means that they can be studied in much greater detail than more distant systems. In particular, can study individual stars in all Local Group galaxies, allowing direct inferences on properties such as star formation histories, chemical abundances and so on. ...
Milky Way Kinematics, or how we discovered the geometry and
... We can measure this rate of shear in disk star motions (how much faster or slower stars orbit with distance toward or away from galactic center). Also need to measure orbital velocity at radius of sun. Li dbl d figured Lindblad fi d out how h to do d this hi last l thing. hi Measure dispersion of s ...
... We can measure this rate of shear in disk star motions (how much faster or slower stars orbit with distance toward or away from galactic center). Also need to measure orbital velocity at radius of sun. Li dbl d figured Lindblad fi d out how h to do d this hi last l thing. hi Measure dispersion of s ...
Chapter 8 - TeacherWeb
... A star life cycle: first stage: it is a ball of gas and dust. Gravity pulls the dust and gas together into a sphere. As the sphere becomes denser it becomes hotter. Hydrogen changes to helium by a process called nuclear fusion. When a star dies its materials return to space---sometimes to form new s ...
... A star life cycle: first stage: it is a ball of gas and dust. Gravity pulls the dust and gas together into a sphere. As the sphere becomes denser it becomes hotter. Hydrogen changes to helium by a process called nuclear fusion. When a star dies its materials return to space---sometimes to form new s ...
Santos: On the relation between stars and their planets
... Spectroscopy is not easy! We can often assure precision but accuracy is much more difficult to guarantee! ...
... Spectroscopy is not easy! We can often assure precision but accuracy is much more difficult to guarantee! ...
Beyond the Solar System By Patti Hutchison ANSWER THE
... The universe is made up of billions of galaxies. The galaxies cluster together in groups. If you could look at the whole universe at once, it would look like a spider web. Between the galaxies, space is almost completely empty. Tiny atoms are hundreds of miles apart. ...
... The universe is made up of billions of galaxies. The galaxies cluster together in groups. If you could look at the whole universe at once, it would look like a spider web. Between the galaxies, space is almost completely empty. Tiny atoms are hundreds of miles apart. ...
Lecture17-ASTA01
... and difficult to detect close to the glare of its star. • However, there are ways to find these planets. • To see how, all you have to do is imagine walking a dog. ...
... and difficult to detect close to the glare of its star. • However, there are ways to find these planets. • To see how, all you have to do is imagine walking a dog. ...
The life of Stars
... • Mira (=wonderful, lat.) [o Ceti]: sometimes visible with bare eye, sometimes faint • Long period variable star: 332 days period • Cool red giants • Sometimes periodic, sometimes irregular • some eject gas into space ...
... • Mira (=wonderful, lat.) [o Ceti]: sometimes visible with bare eye, sometimes faint • Long period variable star: 332 days period • Cool red giants • Sometimes periodic, sometimes irregular • some eject gas into space ...
New light on our Sun`s fate - Space Telescope Science Institute
... star’s mass and luminosity are correlated. Astronomers also began to wonder how stars evolve and thought that perhaps they “move” across the H-R diagram. Over decades, we’ve learned that a star’s mass controls its life; along the way, that property also determines its brightness and temperature. We ...
... star’s mass and luminosity are correlated. Astronomers also began to wonder how stars evolve and thought that perhaps they “move” across the H-R diagram. Over decades, we’ve learned that a star’s mass controls its life; along the way, that property also determines its brightness and temperature. We ...
The Milky Way
... Extrasolar Planets Modern theory of planet formation is evolutionary Many stars should have planets! planets ...
... Extrasolar Planets Modern theory of planet formation is evolutionary Many stars should have planets! planets ...
Quiz Reviews - Orion Observatory
... 3. Why is the relationship between a Cepheid variable star’s period and luminosity important? What is a “standard candle?” Explain the inverse square law. 4. How did Harlow Shapley measure the distance to globular clusters? What did he discover about them? 5. What were the key lines of evidence that ...
... 3. Why is the relationship between a Cepheid variable star’s period and luminosity important? What is a “standard candle?” Explain the inverse square law. 4. How did Harlow Shapley measure the distance to globular clusters? What did he discover about them? 5. What were the key lines of evidence that ...
Astrophysics
... • Most stars are too far away to measure their distance by parallax. If we could find the luminosity of a star by some means not involving its distance, then we could turn things around and find the distance from its apparent brightness. Later we will see that there is a way to find the luminosity! ...
... • Most stars are too far away to measure their distance by parallax. If we could find the luminosity of a star by some means not involving its distance, then we could turn things around and find the distance from its apparent brightness. Later we will see that there is a way to find the luminosity! ...
Order-of-Magnitude Astrophysics
... What is the covering fraction of stars? 27. In the intergalactic medium of a group with line-of-sight velocity dispersion of 200 km/s, what are the lightest atoms that will not be fully ionized? 28. The Space Interferometry Mission (SIM) will require a grid of about 4000 stars over the sky, brighter ...
... What is the covering fraction of stars? 27. In the intergalactic medium of a group with line-of-sight velocity dispersion of 200 km/s, what are the lightest atoms that will not be fully ionized? 28. The Space Interferometry Mission (SIM) will require a grid of about 4000 stars over the sky, brighter ...
Apr 2016 - Bays Mountain Park
... -A grade of 90% or greater results in passing. If you turn in your ...
... -A grade of 90% or greater results in passing. If you turn in your ...
MSci Astrophysics 210PHY412 - Queen's University Belfast
... Students will learn how to interpret observational characteristics of stars in terms of the underlying physical parameters You should gain an understanding of how stars of different mass evolve, and what end products are produced Students should learn what causes planetary nebulae and supernovae You ...
... Students will learn how to interpret observational characteristics of stars in terms of the underlying physical parameters You should gain an understanding of how stars of different mass evolve, and what end products are produced Students should learn what causes planetary nebulae and supernovae You ...
The Association of Dust Disks and Planets Lynne Hillenbrand (Caltech) P.I.
... orbiting farther from their host star, with a 10-year baseline required to detect planets at ∼5 AU. From the known occurrence of giant planets, we expect to discover 10–15 planets from among the 100 “Spitzer” target stars. At least 3 are suspected from the data in hand thusfar. Their masses and orbi ...
... orbiting farther from their host star, with a 10-year baseline required to detect planets at ∼5 AU. From the known occurrence of giant planets, we expect to discover 10–15 planets from among the 100 “Spitzer” target stars. At least 3 are suspected from the data in hand thusfar. Their masses and orbi ...
Stars I - Astronomy Centre
... Distances to Stars • Early astronomers considered the stars to be located on the surface of a sphere, and hence all at the same distance • To understand most properties of stars we need to know their distance • For nearby stars distance can be measured via parallax • This works on the same principl ...
... Distances to Stars • Early astronomers considered the stars to be located on the surface of a sphere, and hence all at the same distance • To understand most properties of stars we need to know their distance • For nearby stars distance can be measured via parallax • This works on the same principl ...
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.