Galaxies and the Universe bb
... absorb visible light. This is the ____________ ________ that makes new star systems. ...
... absorb visible light. This is the ____________ ________ that makes new star systems. ...
The Transiting Exoplanet Survey Satellite
... its host star. For such a “transiting” planet, it is possible to determine the planet’s mass and radius, its orbital parameters, and its atmospheric properties.1 Of particular interest are planets with sizes between those of the Earth and Neptune. Little is known about them, because there are no exa ...
... its host star. For such a “transiting” planet, it is possible to determine the planet’s mass and radius, its orbital parameters, and its atmospheric properties.1 Of particular interest are planets with sizes between those of the Earth and Neptune. Little is known about them, because there are no exa ...
Units
... The seasons are caused by the tilt of Earth’s axis of rotation • The Earth’s axis of rotation is not perpendicular to the plane of the Earth’s orbit • It is tilted about 23½° away from the perpendicular • The Earth maintains this tilt as it orbits the Sun, with the Earth’s north pole pointing towar ...
... The seasons are caused by the tilt of Earth’s axis of rotation • The Earth’s axis of rotation is not perpendicular to the plane of the Earth’s orbit • It is tilted about 23½° away from the perpendicular • The Earth maintains this tilt as it orbits the Sun, with the Earth’s north pole pointing towar ...
NASA FUSE Satellite Solves the Case of the Missing Deuterium
... -2 In 2003, Bruce Draine of Princeton University, a co-author on the new result, developed computer models that showed how deuterium, compared to hydrogen, might preferentially bind to interstellar dust grains, changing from an easily detectable gaseous form to an unobservable solid form. The new F ...
... -2 In 2003, Bruce Draine of Princeton University, a co-author on the new result, developed computer models that showed how deuterium, compared to hydrogen, might preferentially bind to interstellar dust grains, changing from an easily detectable gaseous form to an unobservable solid form. The new F ...
Observations of binary systems with pulsating components
... Obtaining stellar masses from visual orbits requires quite a lot of work: • observations may take years, • relative orbit has to be freed from the effect of inclination, • one needs to know the distance (parallax) of the system. Because of these limitations, this method has been used to obtain relia ...
... Obtaining stellar masses from visual orbits requires quite a lot of work: • observations may take years, • relative orbit has to be freed from the effect of inclination, • one needs to know the distance (parallax) of the system. Because of these limitations, this method has been used to obtain relia ...
Activity : Milky Way
... of the day, we had no evidence that the spiral nebulae were not part of the entire Milky Way ‘universe’. ...
... of the day, we had no evidence that the spiral nebulae were not part of the entire Milky Way ‘universe’. ...
Full Starlight Report
... and meanings of a sky full of stars. Not all the stars, just those that formed links to your natal planets via what is called parans. By considering the star parans in your life you will be encountering a whole new (though very old) layer of myth and meaning to your chart. Welcome to your Stars. Eac ...
... and meanings of a sky full of stars. Not all the stars, just those that formed links to your natal planets via what is called parans. By considering the star parans in your life you will be encountering a whole new (though very old) layer of myth and meaning to your chart. Welcome to your Stars. Eac ...
Astrobiological Stoichiometry
... abundances for the same element in the same star. Figure 2, from the work of Hinkel (2012), illustrates how different research groups measured the elements Na, Si, O, Sc, Al, and Fe in five different stars (the data sets are discussed and the research groups identified by Hinkel, 2012). The maximum ...
... abundances for the same element in the same star. Figure 2, from the work of Hinkel (2012), illustrates how different research groups measured the elements Na, Si, O, Sc, Al, and Fe in five different stars (the data sets are discussed and the research groups identified by Hinkel, 2012). The maximum ...
View PDF - Sara Seager
... will be placed into a highly elliptical 13.7-day orbit around the Earth. During its 2-year mission, TESS will employ four wide-field optical charge-coupled device cameras to monitor at least 200,000 main-sequence dwarf stars with I C ≈ 4 − 13 for temporary drops in brightness caused by planetary tra ...
... will be placed into a highly elliptical 13.7-day orbit around the Earth. During its 2-year mission, TESS will employ four wide-field optical charge-coupled device cameras to monitor at least 200,000 main-sequence dwarf stars with I C ≈ 4 − 13 for temporary drops in brightness caused by planetary tra ...
The Final Version of the White Paper is available.
... The discovery almost 20 years ago of the first giant planet outside of the solar system (Mayor & Queloz 1995) spawned a real revolution in astronomy. The completely unexpected characteristics of this first planet captured the imagination and interest of the scientific community and the general publi ...
... The discovery almost 20 years ago of the first giant planet outside of the solar system (Mayor & Queloz 1995) spawned a real revolution in astronomy. The completely unexpected characteristics of this first planet captured the imagination and interest of the scientific community and the general publi ...
Galactic Nebulae
... Beautiful emission / reflection nebula surrounding massive Ionizing central star . Nebula is located at eastern end of Dark clouds . Cluster of stars at centre of IC5146 are of low mass and young (1 million years old) - pre main sequence stars. ...
... Beautiful emission / reflection nebula surrounding massive Ionizing central star . Nebula is located at eastern end of Dark clouds . Cluster of stars at centre of IC5146 are of low mass and young (1 million years old) - pre main sequence stars. ...
The Perseid Meteor Shower
... the sky in a few seconds, comets travel slowly across the night sky. You would have to watch one for hours or days to see its movement. Comets leave behind dust that causes meteors. When lots of meteors fall one after another, we call it a "meteor shower." A meteor shower is worth watching. Perseid ...
... the sky in a few seconds, comets travel slowly across the night sky. You would have to watch one for hours or days to see its movement. Comets leave behind dust that causes meteors. When lots of meteors fall one after another, we call it a "meteor shower." A meteor shower is worth watching. Perseid ...
Formation of Globular Clusters: In and Out of Dwarf Galaxies
... progenitor galaxies at intermediate redshifts • Model explains observed sizes, masses, ages, metallicities • Dynamical evolution explains the present mass function and may be important for metallicity bimodality • Red clusters in the Galaxy are due to massive late gas-rich mergers • Blue clusters ar ...
... progenitor galaxies at intermediate redshifts • Model explains observed sizes, masses, ages, metallicities • Dynamical evolution explains the present mass function and may be important for metallicity bimodality • Red clusters in the Galaxy are due to massive late gas-rich mergers • Blue clusters ar ...
Kepler Telescope Spots Smallest Exoplanet Yet The Night Sky
... constellations stand in a row from the northeast to south. They're all seen in profile with their noses pointed up and their feet (if any) to the right: Ursa Major in the northeast (with the Big Dipper as its brightest part), Leo in the east, Hydra the Sea Serpent in the southeast, and Canis Major i ...
... constellations stand in a row from the northeast to south. They're all seen in profile with their noses pointed up and their feet (if any) to the right: Ursa Major in the northeast (with the Big Dipper as its brightest part), Leo in the east, Hydra the Sea Serpent in the southeast, and Canis Major i ...
Early-type stars in the core of the young open cluster Westerlund 2
... is dominated by strong and broad H Balmer lines. Weak absorption lines of He λλ 4388, 4471, Mg λ 4481 and Si λ 4552 are also seen. The He λ 4471/Mg λ 4481 intensity ratio indicates a spectral type B8-A0. The appearance of some weak metallic lines favours an A0 classification, whilst ...
... is dominated by strong and broad H Balmer lines. Weak absorption lines of He λλ 4388, 4471, Mg λ 4481 and Si λ 4552 are also seen. The He λ 4471/Mg λ 4481 intensity ratio indicates a spectral type B8-A0. The appearance of some weak metallic lines favours an A0 classification, whilst ...
Betelgeuse - TeacherWeb
... This protosun was about 10 to 50,000 K. After thousands of years Betelgeuse turned a yellow color, about 5,500 K. Now it is between the yellow and bright red stage. ...
... This protosun was about 10 to 50,000 K. After thousands of years Betelgeuse turned a yellow color, about 5,500 K. Now it is between the yellow and bright red stage. ...
The Detection and Characterization of Extrasolar Planets
... orbits the common centre of mass. Another method, known as the transit method, looks for dips in the brightness of the host star as a planet passes across the face of the star. Possibly the most exotic method is to use gravitational lensing, a consequence of Einstein’s theory of General Relativity. ...
... orbits the common centre of mass. Another method, known as the transit method, looks for dips in the brightness of the host star as a planet passes across the face of the star. Possibly the most exotic method is to use gravitational lensing, a consequence of Einstein’s theory of General Relativity. ...
Ursa Minor
Ursa Minor (Latin: ""Smaller She-Bear"", contrasting with Ursa Major), also known as the Little Bear, is a constellation in the northern sky. Like the Great Bear, the tail of the Little Bear may also be seen as the handle of a ladle, hence the name Little Dipper. It was one of the 48 constellations listed by the 2nd-century astronomer Ptolemy, and remains one of the 88 modern constellations. Ursa Minor has traditionally been important for navigation, particularly by mariners, due to Polaris being the North Star.Polaris, the brightest star in the constellation, is a yellow-white supergiant and the brightest Cepheid variable star in the night sky, ranging from apparent magnitude 1.97 to 2.00. Beta Ursae Minoris, also known as Kochab, is an aging star that has swollen and cooled to become an orange giant with an apparent magnitude of 2.08, only slightly fainter than Polaris. Kochab and magnitude 3 Gamma Ursae Minoris have been called the ""guardians of the pole star"". Planets have been detected orbiting four of the stars, including Kochab. The constellation also contains an isolated neutron star—Calvera—and H1504+65, the hottest white dwarf yet discovered with a surface temperature of 200,000 K.