The Quest Ahead - Mr. Catt`s Class
... 5. The distance of the Earth from the Sun does not vary too much during the year and thus is not a determining factor for the seasons. 6. The orientation of the Earth with respect to the Sun is the main reason for the seasons. 7. Altitude is the height of a celestial object (such as the Sun) measur ...
... 5. The distance of the Earth from the Sun does not vary too much during the year and thus is not a determining factor for the seasons. 6. The orientation of the Earth with respect to the Sun is the main reason for the seasons. 7. Altitude is the height of a celestial object (such as the Sun) measur ...
A new low proper motion catalogue of bright M
... habitable zone as well as favourable contrast ratios between the planet and the host star. Though M dwarfs are the most numerous type of stars in the Galaxy, because of their colour and low luminosity they often can be confused for reddened stars or distant red giants. Because of this their identifi ...
... habitable zone as well as favourable contrast ratios between the planet and the host star. Though M dwarfs are the most numerous type of stars in the Galaxy, because of their colour and low luminosity they often can be confused for reddened stars or distant red giants. Because of this their identifi ...
CAPSTONE-poster
... The famous astronomer William Herschel discovered the first planetary nebulae called Dumbbell nebula (M27) in the 1870’s. The name was given because he found an apparent similarity to the disk of Uranus. So far, there are 2,000 planetary nebulae in our Milky Way galaxy and their average lifespan is ...
... The famous astronomer William Herschel discovered the first planetary nebulae called Dumbbell nebula (M27) in the 1870’s. The name was given because he found an apparent similarity to the disk of Uranus. So far, there are 2,000 planetary nebulae in our Milky Way galaxy and their average lifespan is ...
Planetary System Formation, Extrasolar Planets, Life in the Universe
... snow line, in parts of the disk cool enough for ice to be present • Higher surface density -> more rapid formation of planets • In the outer Solar System, planets grew to ~20 MEarth while gas was still present, captured gas to form gas giants • In inner Solar System, no gas was captured • All circul ...
... snow line, in parts of the disk cool enough for ice to be present • Higher surface density -> more rapid formation of planets • In the outer Solar System, planets grew to ~20 MEarth while gas was still present, captured gas to form gas giants • In inner Solar System, no gas was captured • All circul ...
GRB Effects
... The late Ordovician is unusual in that many groups like the trilobites, important Ordovician animal groups in terms of their relative abundance, diversity, and geographic range, go extinct while the more restricted groups persist. ...
... The late Ordovician is unusual in that many groups like the trilobites, important Ordovician animal groups in terms of their relative abundance, diversity, and geographic range, go extinct while the more restricted groups persist. ...
Last Final Review - Steady Server Pages
... We always see the same side Its orbital period is the same as the Earth’s about the sun It rotates around its own axis faster than it orbits Earth It is not in hydrostatic equilibrium The temperature ranges from 90 to 370 Fahrenheit. ...
... We always see the same side Its orbital period is the same as the Earth’s about the sun It rotates around its own axis faster than it orbits Earth It is not in hydrostatic equilibrium The temperature ranges from 90 to 370 Fahrenheit. ...
Exoplanets Properties of the host stars Characterization of the
... abundances, cast light on the origin of stars with planetary systems • In principle, stars with and without planets might preferentially originate in different locations of the Galaxy • Several studies have investigated for possible systematic differences in kinematical properties between stars ho ...
... abundances, cast light on the origin of stars with planetary systems • In principle, stars with and without planets might preferentially originate in different locations of the Galaxy • Several studies have investigated for possible systematic differences in kinematical properties between stars ho ...
Lecture8_2014_v2 - UCO/Lick Observatory
... • The ~ 1700 planets we have detected to date are only a sub-set of potential planets out there • Many of the new solar systems don’t look at all like our own (example: Jupiter-mass planets within the orbit of our Mercury) • These new solar systems have raised big questions about how our own Solar S ...
... • The ~ 1700 planets we have detected to date are only a sub-set of potential planets out there • Many of the new solar systems don’t look at all like our own (example: Jupiter-mass planets within the orbit of our Mercury) • These new solar systems have raised big questions about how our own Solar S ...
Hubble Offers a Dazzling View of Necklace Nebula
... The Necklace Nebula: This Hubble image of the Necklace Nebula reveals a glowing ring of gas that resembles a necklace. The bright dot in the center of the ring is actually two stars orbiting close together. One of the stars is near the end of its life and created the planetary nebula. The estimated ...
... The Necklace Nebula: This Hubble image of the Necklace Nebula reveals a glowing ring of gas that resembles a necklace. The bright dot in the center of the ring is actually two stars orbiting close together. One of the stars is near the end of its life and created the planetary nebula. The estimated ...
Chapter 23 The Milky Way Galaxy
... The orbital speed of an object depends only on the amount of mass between it and the galactic center: ...
... The orbital speed of an object depends only on the amount of mass between it and the galactic center: ...
Chapter 30 Review
... pulsation, astronomers can determine its luminosity and calculate how far away a variable star must be to appear as dim or as bright as it does. ...
... pulsation, astronomers can determine its luminosity and calculate how far away a variable star must be to appear as dim or as bright as it does. ...
Is Draco II one of the faintest dwarf galaxies? First study from Keck
... the nature of such stellar systems is rendered difficult by the apparent merging of the globular cluster and dwarf galaxy realms at the faint end. Although this effect is likely due in part to surface brightness limits in the current searches that translate to only faint and small stellar systems be ...
... the nature of such stellar systems is rendered difficult by the apparent merging of the globular cluster and dwarf galaxy realms at the faint end. Although this effect is likely due in part to surface brightness limits in the current searches that translate to only faint and small stellar systems be ...
Ardua et Astra: On the Calculation of the Dates of the Rising and
... pole appears to move down in the sky, until when we reach the equator it appears to be in the same horizontal plane as the horizon; the stars would appear to be rotating in vertical planes perpendicular to the horizon, and every star would rise and set. It takes roughly 23 hours, 56 minutes for the ...
... pole appears to move down in the sky, until when we reach the equator it appears to be in the same horizontal plane as the horizon; the stars would appear to be rotating in vertical planes perpendicular to the horizon, and every star would rise and set. It takes roughly 23 hours, 56 minutes for the ...
sections 12-15 instructor notes
... clouds that are transparent enough to transmit the light of background stars. The technique is to use (m, log π) tables to deduce the Δ(ρk) function for a nearby reference region that is relatively free of dust extinction, and then determine where in the table one can hang a “dimming” curtain of dus ...
... clouds that are transparent enough to transmit the light of background stars. The technique is to use (m, log π) tables to deduce the Δ(ρk) function for a nearby reference region that is relatively free of dust extinction, and then determine where in the table one can hang a “dimming” curtain of dus ...
1.1 Fundamental Observers
... decreases with increasing r if most of the mass is contained within r. In reality, the rotation curve remains flat well beyond the optical dimensions of the galaxy, indicating that M continues to increase with r. Such observations (and other lines of evidence) have led to the conclusion that the sta ...
... decreases with increasing r if most of the mass is contained within r. In reality, the rotation curve remains flat well beyond the optical dimensions of the galaxy, indicating that M continues to increase with r. Such observations (and other lines of evidence) have led to the conclusion that the sta ...
The Classification of Galaxies By Daniel Underwood Contents The
... matter spiralling out from the bulging centre of the galaxy. There are two types: barred spirals (SB) and non-barred (SA), although if distinction between the two happens to be difficult then “SAB” is used for denotation. A barred spiral is a spiral type (pictured on the right) but with a bar-like f ...
... matter spiralling out from the bulging centre of the galaxy. There are two types: barred spirals (SB) and non-barred (SA), although if distinction between the two happens to be difficult then “SAB” is used for denotation. A barred spiral is a spiral type (pictured on the right) but with a bar-like f ...
AST1100 Lecture Notes
... • By radiation: Photons from the photon gas traveling outwards. The photons cannot travel directly from the core, but will be continuously scattered in many different directions by collisions with other particles. After a large number of scatterings and direction changes it will eventually reach the ...
... • By radiation: Photons from the photon gas traveling outwards. The photons cannot travel directly from the core, but will be continuously scattered in many different directions by collisions with other particles. After a large number of scatterings and direction changes it will eventually reach the ...
Hubble Space Telescope Observations of the Light Echo around
... • Lo 4 occasionally transitions from its normal PG 1159 spectrum to [WCE] • This supports the commonly accepted evolutionary link between the two types • Further observations could test whether the ...
... • Lo 4 occasionally transitions from its normal PG 1159 spectrum to [WCE] • This supports the commonly accepted evolutionary link between the two types • Further observations could test whether the ...
CHP 15
... 1. Herschel's grindstone and Kapteyn's star system were too small because a. they did not count the brightest stars. b. they did not study the southern sky. c. they did not have large enough telescopes. d. they only observed stars in the disk of the galaxy and not the halo. e. they did not know abou ...
... 1. Herschel's grindstone and Kapteyn's star system were too small because a. they did not count the brightest stars. b. they did not study the southern sky. c. they did not have large enough telescopes. d. they only observed stars in the disk of the galaxy and not the halo. e. they did not know abou ...
Lecture03-ASTA01
... • You can look for the planets along the ecliptic appearing like very bright stars. • Mars looks quite orange in colour. • Saturn and Jupiter are silver and usually brighter • Venus is the brightest. Sometimes it’s so close to the sun (in degrees) that it’s hidden in sun’s glare. • Uranus and Neptun ...
... • You can look for the planets along the ecliptic appearing like very bright stars. • Mars looks quite orange in colour. • Saturn and Jupiter are silver and usually brighter • Venus is the brightest. Sometimes it’s so close to the sun (in degrees) that it’s hidden in sun’s glare. • Uranus and Neptun ...
Corvus (constellation)
Corvus is a small constellation in the Southern Celestial Hemisphere. Its name comes from the Latin word ""raven"" or ""crow"". It includes only 11 stars with brighter than 4.02 magnitudes. One of the 48 constellations listed by the 2nd-century astronomer Ptolemy, it remains one of the 88 modern constellations. The four brightest stars, Gamma, Delta, Epsilon, and Beta Corvi from a distinctive quadrilateral in the night sky. The young star Eta Corvi has been found to have two debris disks.