looking up! - Discover the universe
... The Moon is the easiest object to observe in the sky as it is bright and completely safe to observe, unlike the Sun. It’s possible to observe the Moon in urban and rural areas, regardless of the amount of light pollution. Moreover, as it continually changes shape and location in the sky, it’s a perf ...
... The Moon is the easiest object to observe in the sky as it is bright and completely safe to observe, unlike the Sun. It’s possible to observe the Moon in urban and rural areas, regardless of the amount of light pollution. Moreover, as it continually changes shape and location in the sky, it’s a perf ...
Supernovae, Neutrinos, and the Chirality of the Amino Acids
... case). The energy states of the left- and right-handed forms have been shown, by detailed computations, to differ at most by infinitesimal amounts [14, 15], so it would be difficult for thermal equilibrium to produce the imbalance. One suggested mechanism lies with processing of a population of amin ...
... case). The energy states of the left- and right-handed forms have been shown, by detailed computations, to differ at most by infinitesimal amounts [14, 15], so it would be difficult for thermal equilibrium to produce the imbalance. One suggested mechanism lies with processing of a population of amin ...
The Corn Burned by Syrius
... all stars. He found significant aberrations in Sirius’ proper motion, as if it were being tugged from its course. Bessel conjectured that the gravitational effects of the unseen mass of a companion star, not visible to the naked eye or through the magnification of any telescopes then available, coul ...
... all stars. He found significant aberrations in Sirius’ proper motion, as if it were being tugged from its course. Bessel conjectured that the gravitational effects of the unseen mass of a companion star, not visible to the naked eye or through the magnification of any telescopes then available, coul ...
Heavy Element Abundances in Late-B and Early
... Unfortunately, the results from IUE data are constrained by their limited signal-to-noise ratio (S/ N ) (seldom more than 40:1 even for the very best co-added data) and limited resolution (k=k 12000). For a small number of CP stars, observations made with the Hubble Space Telescope’s Goddard High ...
... Unfortunately, the results from IUE data are constrained by their limited signal-to-noise ratio (S/ N ) (seldom more than 40:1 even for the very best co-added data) and limited resolution (k=k 12000). For a small number of CP stars, observations made with the Hubble Space Telescope’s Goddard High ...
Potential for Life on the Terrestrial Planets
... close-in planets). But exoplanets which are discovered by transits can be re-observed by the Doppler method so that their mass can also be determined if the precision is above the current signal threshold. The discovery of CoRoT-7b, the first small rocky exoplanet with measured radius and mass (Lége ...
... close-in planets). But exoplanets which are discovered by transits can be re-observed by the Doppler method so that their mass can also be determined if the precision is above the current signal threshold. The discovery of CoRoT-7b, the first small rocky exoplanet with measured radius and mass (Lége ...
Legends Night Sky Orion
... - One story from this culture gives an interesting account of Orion’s death: “In it he is called Aqhat, and was a handsome and famous hunter. The Battle Goddess Anat feel in love with Aqhat, but when he refused to lend her his bow, she sent another man to steal it. This man bungled the job, and woun ...
... - One story from this culture gives an interesting account of Orion’s death: “In it he is called Aqhat, and was a handsome and famous hunter. The Battle Goddess Anat feel in love with Aqhat, but when he refused to lend her his bow, she sent another man to steal it. This man bungled the job, and woun ...
Physics 125 Solar System Astronomy
... to the destruction of many important • The burning of the library of Alexandria led∆t documents. Some Muslim scholars had translated some works (Aristotles, in particular) into Arabic. These were later translated into Latin after most of the original Greek copies were destroyed (referred to as the R ...
... to the destruction of many important • The burning of the library of Alexandria led∆t documents. Some Muslim scholars had translated some works (Aristotles, in particular) into Arabic. These were later translated into Latin after most of the original Greek copies were destroyed (referred to as the R ...
Period analysis of variable stars by robust smoothing
... two eclipses and (2) the difference of amplitude between the primary minimum and the secondary minimum. The light curve (the solid line in the top panel) by SuperSmoother has almost the same amplitudes between two minima and is rounded between eclipses, while the light curves fitted by other smoothi ...
... two eclipses and (2) the difference of amplitude between the primary minimum and the secondary minimum. The light curve (the solid line in the top panel) by SuperSmoother has almost the same amplitudes between two minima and is rounded between eclipses, while the light curves fitted by other smoothi ...
chapter 15 navigational astronomy
... Uranus is barely visible to the unaided eye; Neptune and Pluto are not visible without a telescope. Planets can be identified in the sky because, unlike the stars, they do not twinkle. The stars are so distant that they are point sources of light. Therefore the stream of light from a star is easily ...
... Uranus is barely visible to the unaided eye; Neptune and Pluto are not visible without a telescope. Planets can be identified in the sky because, unlike the stars, they do not twinkle. The stars are so distant that they are point sources of light. Therefore the stream of light from a star is easily ...
Binarity in carbon-enhanced metal-poor stars
... deposited large amounts of newly formed carbon and s-process material on its neighbour. Strong evidence in favour of this scenario was found from repeated radial velocity measurements. The fraction of stars that show significant velocity variability in the CEMP-s class is sufficiently high to comfor ...
... deposited large amounts of newly formed carbon and s-process material on its neighbour. Strong evidence in favour of this scenario was found from repeated radial velocity measurements. The fraction of stars that show significant velocity variability in the CEMP-s class is sufficiently high to comfor ...
Stellar Lifetimes
... • Observations of star clusters show that a star becomes larger, redder, and more luminous after its time on the main sequence is over. • At the end of their main sequence life time - when hydrogen in the core is exhausted - stars ascend the red giant branch. © 2007 Pearson Education Inc., publishin ...
... • Observations of star clusters show that a star becomes larger, redder, and more luminous after its time on the main sequence is over. • At the end of their main sequence life time - when hydrogen in the core is exhausted - stars ascend the red giant branch. © 2007 Pearson Education Inc., publishin ...
Essential physics of early galaxy formation
... (SMF; González et al. 2011), understand the stellar populations in these sources through their UV (β) slopes (Bouwens et al. 2010b; Finkelstein et al. 2012; Wilkins et al. 2011; Dunlop et al. 2012, 2013; Bouwens et al. 2013; Rogers et al. 2014), infer their physical properties (Oesch et al. 2010a; ...
... (SMF; González et al. 2011), understand the stellar populations in these sources through their UV (β) slopes (Bouwens et al. 2010b; Finkelstein et al. 2012; Wilkins et al. 2011; Dunlop et al. 2012, 2013; Bouwens et al. 2013; Rogers et al. 2014), infer their physical properties (Oesch et al. 2010a; ...
Seasons and the Appearance of the Sky
... • We cannot see stars near the south celestial pole. • All other stars (and Sun, Moon, planets) rise in east and set in west. A circumpolar star never sets Celestial equator This star never rises ...
... • We cannot see stars near the south celestial pole. • All other stars (and Sun, Moon, planets) rise in east and set in west. A circumpolar star never sets Celestial equator This star never rises ...
Article PDF - IOPscience
... M31. They span distances in the range of ∼45 arcmin (G76) to ∼4 deg (B514) from the center of M31, thus allowing us to probe different areas of Andromeda, from the galaxy’s unperturbed halo to regions close to the giant stream. We are aware that these few clusters may not necessarily be representati ...
... M31. They span distances in the range of ∼45 arcmin (G76) to ∼4 deg (B514) from the center of M31, thus allowing us to probe different areas of Andromeda, from the galaxy’s unperturbed halo to regions close to the giant stream. We are aware that these few clusters may not necessarily be representati ...
Masses of Dwarf Satellites of the Milky Way
... Q, for 526 subhaloes in the main halo of the Aq-A-1 simulation. haloes considered contain between 20 000 and nearly ∼10 million . The lines in different colours show averages in logarithmic mass each of the three profiles. ...
... Q, for 526 subhaloes in the main halo of the Aq-A-1 simulation. haloes considered contain between 20 000 and nearly ∼10 million . The lines in different colours show averages in logarithmic mass each of the three profiles. ...
Magnificent Cosmos - Academic Program Pages at Evergreen
... because of a closely orbiting planet, which revolves around the star fully every 4.2 days—at a whopping speed of 482,000 kilometers (299,000 miles) an hour, more than four times faster than Earth orbits the sun. Another survey of 107 sunlike stars, performed by our team at San Francisco State Univer ...
... because of a closely orbiting planet, which revolves around the star fully every 4.2 days—at a whopping speed of 482,000 kilometers (299,000 miles) an hour, more than four times faster than Earth orbits the sun. Another survey of 107 sunlike stars, performed by our team at San Francisco State Univer ...
Hot subdwarf stars-galactic orbits and distribution perpendicular to
... (small) sample had disk orbits but 1 star had an orbit with z-distance maxima ranging from 8 to 20 kpc. Evidence for more stars with halo orbits was given by de Boer et al. (1995). We have investigated 41 stars for their kinematic behaviour. The choice of stars was solely determined by the availabil ...
... (small) sample had disk orbits but 1 star had an orbit with z-distance maxima ranging from 8 to 20 kpc. Evidence for more stars with halo orbits was given by de Boer et al. (1995). We have investigated 41 stars for their kinematic behaviour. The choice of stars was solely determined by the availabil ...
Is $^ 6$ Li in metal-poor halo stars produced in situ by solar
... It has been known for many years that the chromospheric and coronal activities of dwarf stars are closely related to their rotation (Kraft 1967). This relationship results from the generation and amplification of surface magnetic fields by a complex dynamo mechanism, whose efficiency depends on the in ...
... It has been known for many years that the chromospheric and coronal activities of dwarf stars are closely related to their rotation (Kraft 1967). This relationship results from the generation and amplification of surface magnetic fields by a complex dynamo mechanism, whose efficiency depends on the in ...
Hubble Diagram Instruction Sheet
... standard candles. There are two classes of supernovae, Type I and Type II. For this activity we will be using Type Ia supernovae only. Type Ia supernovae are very important in astronomy as they offer the most reliable sources for measuring cosmic distances up to and beyond 1000 mega parsecs (Mpc). A ...
... standard candles. There are two classes of supernovae, Type I and Type II. For this activity we will be using Type Ia supernovae only. Type Ia supernovae are very important in astronomy as they offer the most reliable sources for measuring cosmic distances up to and beyond 1000 mega parsecs (Mpc). A ...
Space, Earth and Celestial Objects Test Prep
... caused by an impact with another asteroid or by the gravitational pull of Jupiter or Mars. The closest known near-Earth collision was in 1994, when asteroid 1994 XL1 came within the Moon’s orbit at a distance of 100,000 kilometers from Earth. Earth had missed hitting this asteroid by a mere 52 minut ...
... caused by an impact with another asteroid or by the gravitational pull of Jupiter or Mars. The closest known near-Earth collision was in 1994, when asteroid 1994 XL1 came within the Moon’s orbit at a distance of 100,000 kilometers from Earth. Earth had missed hitting this asteroid by a mere 52 minut ...
Stellar evolution - Statistical Physics Group
... diagrams were accounted for by differing cluster age and chemical composition, seemed generally satisfactory. Today much more precise correlations are demanded between theory and observation but, although some types of star have not yet been placed in the evolutionary picture and there are still som ...
... diagrams were accounted for by differing cluster age and chemical composition, seemed generally satisfactory. Today much more precise correlations are demanded between theory and observation but, although some types of star have not yet been placed in the evolutionary picture and there are still som ...
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.