life
... L = Mean lifetime of intelligent life = 100 – 109 years •We have the ability to destroy civilization •We are also damaging our environment •We are using up non-renewable resources •Civilizations may “mature” – some evidence •Sustainable civilizations is technically possible ...
... L = Mean lifetime of intelligent life = 100 – 109 years •We have the ability to destroy civilization •We are also damaging our environment •We are using up non-renewable resources •Civilizations may “mature” – some evidence •Sustainable civilizations is technically possible ...
Circumstellar Zones
... occurs – this is the total amount of time the planet spends in the CHZ. Complete the table for the range of stellar masses. ...
... occurs – this is the total amount of time the planet spends in the CHZ. Complete the table for the range of stellar masses. ...
Galactic astronomy - Sierra College Astronomy Home Page
... Pure H & He stars, the first stars born after the Big Bang when very little metals existed. Stellar models tell us that Pop III stars would have been massive, shortlived, and none would have survived to current times. ...
... Pure H & He stars, the first stars born after the Big Bang when very little metals existed. Stellar models tell us that Pop III stars would have been massive, shortlived, and none would have survived to current times. ...
STELLAR EVOLUTION
... Theoretical models of the internal structure of stars, derived using computer-intensive calculations, are compared with the observed properties of individual stars. The theoretical models are then continually “tweaked” to match the data. These models incorporate the basic laws of physics as we und ...
... Theoretical models of the internal structure of stars, derived using computer-intensive calculations, are compared with the observed properties of individual stars. The theoretical models are then continually “tweaked” to match the data. These models incorporate the basic laws of physics as we und ...
January 2005
... the Cassini Orbiter, Huygens will be set free on Dec. 25, 2004. The probe will coast for 21 days en route to Titan. Huygens will separate from Cassini at one foot per second and a spin rate of seven revolutions per minute to ensure stability during the coast and entry phase. Five days following the ...
... the Cassini Orbiter, Huygens will be set free on Dec. 25, 2004. The probe will coast for 21 days en route to Titan. Huygens will separate from Cassini at one foot per second and a spin rate of seven revolutions per minute to ensure stability during the coast and entry phase. Five days following the ...
Post-class version
... – The brightness of the background is very slightly nonuniform, so the primordial fireball was too. – Denser regions in the fireball eventually gave rise to superclusters in the universe today, through gravitational contraction. ...
... – The brightness of the background is very slightly nonuniform, so the primordial fireball was too. – Denser regions in the fireball eventually gave rise to superclusters in the universe today, through gravitational contraction. ...
Overview and status of the Kepler Mission - Harvard
... that of Earth it doesn’t have sufficient gravity to hold onto a life-sustaining atmosphere. If it is much more than about ten Earth masses then it has sufficient gravity to hold onto the abundant light elements hydrogen and helium and turn into a gas giant by accretion during the planet formation ph ...
... that of Earth it doesn’t have sufficient gravity to hold onto a life-sustaining atmosphere. If it is much more than about ten Earth masses then it has sufficient gravity to hold onto the abundant light elements hydrogen and helium and turn into a gas giant by accretion during the planet formation ph ...
Classification and structure of galaxies
... How do we know what our Galaxy looks like? We can see: • Stars and star clusters – microwaves generated by water from H II regions (called the MASER technique) traces the Milky Way’s spiral arms • Nebulae – infrared light (detected by the Spitzer Space Telescope) shows the outline of the heat genera ...
... How do we know what our Galaxy looks like? We can see: • Stars and star clusters – microwaves generated by water from H II regions (called the MASER technique) traces the Milky Way’s spiral arms • Nebulae – infrared light (detected by the Spitzer Space Telescope) shows the outline of the heat genera ...
Issue #87 of Lunar and Planetary Information Bulletin
... masses, orbital periods, and eccentric orbits of the companions detected so far are not consistent with what we know about planets in our own solar system. The smallest object thus detected has a lower-limit mass of approximately one-half that of Jupiter, but most of the objects have masses greater ...
... masses, orbital periods, and eccentric orbits of the companions detected so far are not consistent with what we know about planets in our own solar system. The smallest object thus detected has a lower-limit mass of approximately one-half that of Jupiter, but most of the objects have masses greater ...
The Milky Way Galaxy
... • The Milky Way galaxy is home to 400 billion stars and our own Sun and Solar System. • It is a barred spiral galaxy. • Scientists think the centre of the galaxy contains a super massive black hole. • The Milky Way is full of dust, gas and stars. • The Milky Way, along with everything else, is ...
... • The Milky Way galaxy is home to 400 billion stars and our own Sun and Solar System. • It is a barred spiral galaxy. • Scientists think the centre of the galaxy contains a super massive black hole. • The Milky Way is full of dust, gas and stars. • The Milky Way, along with everything else, is ...
te acher`s guide te acher`s guide
... question using computer graphics and space footage. What are the signs of the zodiac? The signs of the zodiac are twelve different groups of stars that are named after animals or mythical creatures.They are constellations — patterns of stars in the night sky — that appear to create outlines of pictu ...
... question using computer graphics and space footage. What are the signs of the zodiac? The signs of the zodiac are twelve different groups of stars that are named after animals or mythical creatures.They are constellations — patterns of stars in the night sky — that appear to create outlines of pictu ...
the curious incident of the dog in the night-time
... rate of expansion forever and ever). While somewhat boring, this model of the Universe fit with many other cosmological measurements that were more accurately determined. All of this changed rather suddenly in 1999 (and following) when two groups (or “collaborations”) of astronomers and astrophysici ...
... rate of expansion forever and ever). While somewhat boring, this model of the Universe fit with many other cosmological measurements that were more accurately determined. All of this changed rather suddenly in 1999 (and following) when two groups (or “collaborations”) of astronomers and astrophysici ...
Slide 1
... could also have planets orbiting around them. These are called “extra-solar planets”. ...
... could also have planets orbiting around them. These are called “extra-solar planets”. ...
8 clusters stellar evo
... fusing Hydrogen into Helium Stars leave the main sequence and become red giants ...
... fusing Hydrogen into Helium Stars leave the main sequence and become red giants ...
Document
... • Gamma-ray blazars, relativistic beaming • Microquasars • Radioisotopes in interstellar medium • Successors: Swift, INTEGRAL, GLAST ...
... • Gamma-ray blazars, relativistic beaming • Microquasars • Radioisotopes in interstellar medium • Successors: Swift, INTEGRAL, GLAST ...
Refuges for Life in a - University of Arizona
... Metallicity is not the only compositional prerequisite for habitable planets; the relative abundances of different elements matter, too. The most abundant elements on Earth were produced primarily in supernova explosions, of which there are two basic types. Type I events, most of which result from t ...
... Metallicity is not the only compositional prerequisite for habitable planets; the relative abundances of different elements matter, too. The most abundant elements on Earth were produced primarily in supernova explosions, of which there are two basic types. Type I events, most of which result from t ...
Astronomy Power Point
... • All stars are huge spheres of glowing gas (mostly hydrogen). • Stars are classified based on 3 main physical characteristics: – Temperature – Brightness – size ...
... • All stars are huge spheres of glowing gas (mostly hydrogen). • Stars are classified based on 3 main physical characteristics: – Temperature – Brightness – size ...
CO 2 Cycle
... carried sediment in the past several years…The atmosphere on Mars is so thin that liquid water cannot persist at the surface. However, researchers propose that water could remain liquid long enough, after breaking out from an underground source, to carry debris before totally evaporating and freezin ...
... carried sediment in the past several years…The atmosphere on Mars is so thin that liquid water cannot persist at the surface. However, researchers propose that water could remain liquid long enough, after breaking out from an underground source, to carry debris before totally evaporating and freezin ...
Universe Discovery Guides: January
... The bright reddish star marking the shoulder of Orion, the mighty hunter, is a mighty workaholic. Born as a super-massive star millions of years ago, Betelgeuse is now nearing the end of its life and has expanded to become a red supergiant star. But it is still working hard to build the wealth neede ...
... The bright reddish star marking the shoulder of Orion, the mighty hunter, is a mighty workaholic. Born as a super-massive star millions of years ago, Betelgeuse is now nearing the end of its life and has expanded to become a red supergiant star. But it is still working hard to build the wealth neede ...
The James Webb Space Telescope: A Vision for the Future
... hidden universe These two close-up images by the Hubble Space Telescope reveal how different the star-forming nebula NGC 2174 appears in visible and near-infrared light. On the top is a visible-light view, revealing a rugged landscape, with ridges and tall pillars of gas. The near-infrared image bel ...
... hidden universe These two close-up images by the Hubble Space Telescope reveal how different the star-forming nebula NGC 2174 appears in visible and near-infrared light. On the top is a visible-light view, revealing a rugged landscape, with ridges and tall pillars of gas. The near-infrared image bel ...
stars & galaxies
... our home iN The sTars… • The Milky Way has a diameter of about 100,000 light years. • The nucleus is 2000 light years thick. • Our sun is located 30,000 light years from the nucleus. • It takes the sun 200 million years to ...
... our home iN The sTars… • The Milky Way has a diameter of about 100,000 light years. • The nucleus is 2000 light years thick. • Our sun is located 30,000 light years from the nucleus. • It takes the sun 200 million years to ...
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.