International Reporter, India 07-24-06 A Glimpse at the Future of Our Sun
... or clouds analogous to sunspots, shock waves generated by pulsating envelopes, or even planets. “The typical belief is that stars have to be symmetric gas balls,” said Ragland, an interferometer specialist. “But 30 percent of these red giants showed asymmetry, which has implications for the last sta ...
... or clouds analogous to sunspots, shock waves generated by pulsating envelopes, or even planets. “The typical belief is that stars have to be symmetric gas balls,” said Ragland, an interferometer specialist. “But 30 percent of these red giants showed asymmetry, which has implications for the last sta ...
Astronomical Ideas Fall 2012 HW 2 solutions 1. a. Compare the
... Sun than the Earth is) or a result of observational bias. We are biased towards finding planets nearby their parent stars in transit searches, because planets with smaller orbital radii have shorter periods. We need to observe multiple transits to confirm the presence of a planet via this technique. ...
... Sun than the Earth is) or a result of observational bias. We are biased towards finding planets nearby their parent stars in transit searches, because planets with smaller orbital radii have shorter periods. We need to observe multiple transits to confirm the presence of a planet via this technique. ...
Exoplanets - Mid-Pacific Institute
... Twice the age of Earth Existence challenges accepted theories of planet formation Undermines assumptions about solar system formation ...
... Twice the age of Earth Existence challenges accepted theories of planet formation Undermines assumptions about solar system formation ...
Science 9: Unit E: Space Exploration
... Science 9: Unit E: Space Exploration Topic 4: Bigger and Smarter Telescopes ...
... Science 9: Unit E: Space Exploration Topic 4: Bigger and Smarter Telescopes ...
Stellar Masses
... magnitudes for various objects-Supernovae, Cepheids etc- but they are only average magnitudes.Each varies from the mean.As we move to greater distances it will be easier to detect only those at the high end of the distribution i.e.the brightest. This obviously leads to errors and results in what is ...
... magnitudes for various objects-Supernovae, Cepheids etc- but they are only average magnitudes.Each varies from the mean.As we move to greater distances it will be easier to detect only those at the high end of the distribution i.e.the brightest. This obviously leads to errors and results in what is ...
Planets Beyond the Solar System
... • ~ 4000 BCE: 5 (Mercury, Venus, Mars, Jupiter, Saturn) • ~ 1610: 6 (Earth) • 1781: 7 (Uranus) • 1846: 8 (Neptune) • 1930: 9 (Pluto) • Mid-1995: Still 9! • June 8, 2007: 237 ...
... • ~ 4000 BCE: 5 (Mercury, Venus, Mars, Jupiter, Saturn) • ~ 1610: 6 (Earth) • 1781: 7 (Uranus) • 1846: 8 (Neptune) • 1930: 9 (Pluto) • Mid-1995: Still 9! • June 8, 2007: 237 ...
Slide 1
... enters the Earth’s atmosphere before reaching the telescope. where the oxygen absorption line is formed . Only the two lines at 620 nm and 730 nm are caused by absorptions in the Titan atmosphere. This is due to the presence of methane CH4 . Titan is is a curious place indeed , because CH4 is a natu ...
... enters the Earth’s atmosphere before reaching the telescope. where the oxygen absorption line is formed . Only the two lines at 620 nm and 730 nm are caused by absorptions in the Titan atmosphere. This is due to the presence of methane CH4 . Titan is is a curious place indeed , because CH4 is a natu ...
Powerpoint file
... a Short-Period Planet ("Hot Jupiters") • Transit Probability for the Hot Jupiters: ~ 10% • Therefore 1 Transit/1000 Stars is expected • 30-40 Transits for the full surveyed Stellar Sample are expected if the 47 Tuc Planet occurence is the same as in Field Stars ...
... a Short-Period Planet ("Hot Jupiters") • Transit Probability for the Hot Jupiters: ~ 10% • Therefore 1 Transit/1000 Stars is expected • 30-40 Transits for the full surveyed Stellar Sample are expected if the 47 Tuc Planet occurence is the same as in Field Stars ...
pptx
... Ncivil = N* fp np fl fi fc fL Now make your best guess at each number and multiply them. What do you get? N* = the number of stars in the Milky Way = 200,000,000,000 fp = the fraction of stars that have “habitable planets” = 0.5 np = the number of habitable planets per system = 2 fl = t ...
... Ncivil = N* fp np fl fi fc fL Now make your best guess at each number and multiply them. What do you get? N* = the number of stars in the Milky Way = 200,000,000,000 fp = the fraction of stars that have “habitable planets” = 0.5 np = the number of habitable planets per system = 2 fl = t ...
Lec12
... squeezed as they move into spiral arms 2. Squeezing of clouds triggers star formation 3. Young stars flow out of spiral arms ...
... squeezed as they move into spiral arms 2. Squeezing of clouds triggers star formation 3. Young stars flow out of spiral arms ...
The Milky Way
... • We define our age by trips around the Sun. • How many trips of Sun around Milky Way? R = 8.5 kpc V = 220km/s P = 2.5x108 yrs ...
... • We define our age by trips around the Sun. • How many trips of Sun around Milky Way? R = 8.5 kpc V = 220km/s P = 2.5x108 yrs ...
100 $100 $100 $100 $100 $100 $200 $200 $200 $200 $200 $200
... not affected and clumped together before ordinary matter. Later, these dark matter clumps attracted ordinary matter, leading to today’s structure. ...
... not affected and clumped together before ordinary matter. Later, these dark matter clumps attracted ordinary matter, leading to today’s structure. ...
Dark Matter Dark Energy The History of the Universe More of the
... not affected and clumped together before ordinary matter. Later, these dark matter clumps attracted ordinary matter, leading to today’s structure. ...
... not affected and clumped together before ordinary matter. Later, these dark matter clumps attracted ordinary matter, leading to today’s structure. ...
The Milky Way
... And pray that there's intelligent life somewhere up in space, 'Cause there's bugger all down here on Earth. ...
... And pray that there's intelligent life somewhere up in space, 'Cause there's bugger all down here on Earth. ...
KOI-54 Claude Plymate There is a star system about 45 light years
... There is a star system about 45 light years away in the constellation Cygnus. The system we know as HD 187091 (also known as KOI-54 for Kepler Object of Interest 54) is an undistinguished 8th magnitude A star or was before the Kepler telescope took a close look. As it turns out, the system is anythi ...
... There is a star system about 45 light years away in the constellation Cygnus. The system we know as HD 187091 (also known as KOI-54 for Kepler Object of Interest 54) is an undistinguished 8th magnitude A star or was before the Kepler telescope took a close look. As it turns out, the system is anythi ...
File - Adopt A Constellation
... it was originally, and had become cooler. • They are frequently red/orange in color. • Our sun will eventually become a red giant! • Stars spend approximately a few thousand to 1 billion years as a red giant. • A blue giant is a huge, very hot, blue star. It is a post-main sequence star that burns h ...
... it was originally, and had become cooler. • They are frequently red/orange in color. • Our sun will eventually become a red giant! • Stars spend approximately a few thousand to 1 billion years as a red giant. • A blue giant is a huge, very hot, blue star. It is a post-main sequence star that burns h ...
2012年雅思阅读考试考前冲刺试题（1）
... 11.答案：orbiting (第12段第1句：Since the discovery in 1995 of the first "exoplanet" - a planet orbiting a star other than the Sun - more than 200 others have been found by ground-based observatories.) 12.答案：harbour life (第13段：Until now the usual method of finding exoplanets has been to detect the "wobble" ...
... 11.答案：orbiting (第12段第1句：Since the discovery in 1995 of the first "exoplanet" - a planet orbiting a star other than the Sun - more than 200 others have been found by ground-based observatories.) 12.答案：harbour life (第13段：Until now the usual method of finding exoplanets has been to detect the "wobble" ...
Extra-Solar Planets
... discovered in 1995. We now know of 209 (Feb 07). Including several stars with more than one planet - true planetary systems ...
... discovered in 1995. We now know of 209 (Feb 07). Including several stars with more than one planet - true planetary systems ...
Detectability of Earth-like Planets by Direct Imaging - RIT
... = 5, we find that the total integration time to image each HZ once is ~200 days. • In less than 5 years each HZ could be searched 5 times to SNR = 5. ...
... = 5, we find that the total integration time to image each HZ once is ~200 days. • In less than 5 years each HZ could be searched 5 times to SNR = 5. ...
Spectroscopy
... 1) Larger stars emit more radiation. This makes it harder for planets to form because the light from the star pushes away rocks and debris needed to make planets. 2) Our instruments for detecting planets are sort of crude. Because of this, we only really see the big ones since they’re more visible. ...
... 1) Larger stars emit more radiation. This makes it harder for planets to form because the light from the star pushes away rocks and debris needed to make planets. 2) Our instruments for detecting planets are sort of crude. Because of this, we only really see the big ones since they’re more visible. ...
Galaxies
... • The Milky Way system is a spiral galaxy consisting of over 400 billion stars, plus gas and dust arranged into three general components: – The halo: a roughly spherical distribution which contains the oldest stars in the Galaxy including Globular Clusters; – The nuclear bulge and Galactic Center: t ...
... • The Milky Way system is a spiral galaxy consisting of over 400 billion stars, plus gas and dust arranged into three general components: – The halo: a roughly spherical distribution which contains the oldest stars in the Galaxy including Globular Clusters; – The nuclear bulge and Galactic Center: t ...
HighRedshiftGalaxies
... The precision of the technique can be improved if the optical-infrared color is available as an extra parameter. In this way a first-order correction can be made for the past star formation history and hence the effect of the spread in the lower panel of this figure can be used to improve the mass e ...
... The precision of the technique can be improved if the optical-infrared color is available as an extra parameter. In this way a first-order correction can be made for the past star formation history and hence the effect of the spread in the lower panel of this figure can be used to improve the mass e ...
THE MILKY WAY GALAXY
... disk, from our perspective more stars are visible looking through the disk then are seen looking away from the disk. The nature and size of the Galaxy, as well as our location within this stellar system were finally appreciated in the early 20th century when: The locations of the globular clusters ...
... disk, from our perspective more stars are visible looking through the disk then are seen looking away from the disk. The nature and size of the Galaxy, as well as our location within this stellar system were finally appreciated in the early 20th century when: The locations of the globular clusters ...
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.