Moitinho et al. - Wiley Online Library
... non-Galactic population, but in this case they are much closer than the proposed distance to the CMa galaxy. We now focus on the stellar groups marked with a lighter tone. These groups are distributed between l = 190◦ and l = 270◦ , but seem to form an elongated structure between l = 230◦ and l = 25 ...
... non-Galactic population, but in this case they are much closer than the proposed distance to the CMa galaxy. We now focus on the stellar groups marked with a lighter tone. These groups are distributed between l = 190◦ and l = 270◦ , but seem to form an elongated structure between l = 230◦ and l = 25 ...
Basic principles of celestial navigation
... Imagine that a terrestrial observer is located at a fixed point P of unknown latitude % and longitude &. The celestial sphere rotates westward from the observer’s point of view at an angular rate such that the vernal equinox transits !passes through" the observer’s meridian from east to west at inte ...
... Imagine that a terrestrial observer is located at a fixed point P of unknown latitude % and longitude &. The celestial sphere rotates westward from the observer’s point of view at an angular rate such that the vernal equinox transits !passes through" the observer’s meridian from east to west at inte ...
Basic principles of celestial navigation
... Imagine that a terrestrial observer is located at a fixed point P of unknown latitude % and longitude &. The celestial sphere rotates westward from the observer’s point of view at an angular rate such that the vernal equinox transits !passes through" the observer’s meridian from east to west at inte ...
... Imagine that a terrestrial observer is located at a fixed point P of unknown latitude % and longitude &. The celestial sphere rotates westward from the observer’s point of view at an angular rate such that the vernal equinox transits !passes through" the observer’s meridian from east to west at inte ...
KINEMATIC DISCOVERY OF A STELLAR STREAM LOCATED IN
... RGB stars shown in Figure 1, we selected a smaller velocity range of 75 km s−1 < vgsr < 115 km s−1 . We plotted the positions of stars in Galactic coordinates, and noted that many of these velocity-selected giant stars with metallicities between −2.8 < [Fe/H] < −1.8 are concentrated in a small fract ...
... RGB stars shown in Figure 1, we selected a smaller velocity range of 75 km s−1 < vgsr < 115 km s−1 . We plotted the positions of stars in Galactic coordinates, and noted that many of these velocity-selected giant stars with metallicities between −2.8 < [Fe/H] < −1.8 are concentrated in a small fract ...
5 - White Dwarfs - University of Texas Astronomy
... dwarf leading to an increase in the frictional heating and the light output in the process. Detailed studies suggest that the disk-heating instability described in Chapter 4 (see Figure 4.5) is the primary cause of dwarf novae. Matter piles up in the disk in a cool, dim storage phase until the disk ...
... dwarf leading to an increase in the frictional heating and the light output in the process. Detailed studies suggest that the disk-heating instability described in Chapter 4 (see Figure 4.5) is the primary cause of dwarf novae. Matter piles up in the disk in a cool, dim storage phase until the disk ...
FIFTH EXAM -- REVIEW PROBLEMS
... Calculate the velocity of the satellite in this orbit. Calculate the total energy of the satellite in this orbit. Calculate the minimum amount by which the satellite's velocity must be increased in order that it escapes from the Earth. Ignore the Sun and all other planets. Assume that a black hole h ...
... Calculate the velocity of the satellite in this orbit. Calculate the total energy of the satellite in this orbit. Calculate the minimum amount by which the satellite's velocity must be increased in order that it escapes from the Earth. Ignore the Sun and all other planets. Assume that a black hole h ...
Rotation Periods and Relative Ages of Solar-Type Stars
... context of previously-published hypotheses, calculated rotation periods, or Pcalc, were obtained for each star. These Pcalc are a function of chromospheric activity level as well as B - V spectral type. The formula for the calculation of rotation periods was derived from Noyes’ algorithm for determi ...
... context of previously-published hypotheses, calculated rotation periods, or Pcalc, were obtained for each star. These Pcalc are a function of chromospheric activity level as well as B - V spectral type. The formula for the calculation of rotation periods was derived from Noyes’ algorithm for determi ...
3. What are the intrinsic and extrinsic environments of exoplanets?
... carefully vetted information on both the stars themselves and their immediate environments. The compilation will focus on the nearest stars, but will include all known exoplanetary systems, including new results from ground and space based observations (e.g., microlensing surveys, high precision sp ...
... carefully vetted information on both the stars themselves and their immediate environments. The compilation will focus on the nearest stars, but will include all known exoplanetary systems, including new results from ground and space based observations (e.g., microlensing surveys, high precision sp ...
Dark Matter In The 21st Century
... 3) The laws of physics are different in the Coma cluster than in our galaxy 4) The vast majority of the Coma cluster’s mass is in non-luminous material (dark matter) To discriminate between these various possibilities, it would be necessary to study other clusters and see if they too had large mass ...
... 3) The laws of physics are different in the Coma cluster than in our galaxy 4) The vast majority of the Coma cluster’s mass is in non-luminous material (dark matter) To discriminate between these various possibilities, it would be necessary to study other clusters and see if they too had large mass ...
Betelgeuse: an unauthorized biography
... velocity of individual spectral lines can vary by up to about 10 km s–1. The variations appear random on timescales of 100 to 400 days, but are superimposed on a clear period of 5.78 years (Goldberg 1984), to which Dupree et al. (1987) have added a 420-day period. The position angle of linear polari ...
... velocity of individual spectral lines can vary by up to about 10 km s–1. The variations appear random on timescales of 100 to 400 days, but are superimposed on a clear period of 5.78 years (Goldberg 1984), to which Dupree et al. (1987) have added a 420-day period. The position angle of linear polari ...
The Star-Galaxy Era of Big History in the Light of Universal
... ‘disc’), and periphery (so called ‘halo’) (Baade 2002: 255). The halo consists of both single stars and various stellar clusters. The halo's radius (a few hundred thousand light years) is much larger than the radius of the galaxy's disc.4 According to Hubble, the galaxies are classified into spiral, ...
... ‘disc’), and periphery (so called ‘halo’) (Baade 2002: 255). The halo consists of both single stars and various stellar clusters. The halo's radius (a few hundred thousand light years) is much larger than the radius of the galaxy's disc.4 According to Hubble, the galaxies are classified into spiral, ...
SPACETIME SINGULARITIES: The STORY of BLACK HOLES
... with the mass of the earth would have Rs ∼ 9mm! What this means is that we would have to cram the entire mass of the earth into a region of diameter less than 18mm (just over the size of a dime) before the gravitational field exerted by this mass would be strong enough to hold back light, and for it ...
... with the mass of the earth would have Rs ∼ 9mm! What this means is that we would have to cram the entire mass of the earth into a region of diameter less than 18mm (just over the size of a dime) before the gravitational field exerted by this mass would be strong enough to hold back light, and for it ...
What To See Telescope(Jul-Sept) v1 - One
... locate specific major constellations. To help you get oriented, the last appendix includes three whole-sky maps that show the constellations as seen from mid-northern latitudes in July, August, and September. Your telescope may have come with at least two eyepieces, and you may have acquired one or ...
... locate specific major constellations. To help you get oriented, the last appendix includes three whole-sky maps that show the constellations as seen from mid-northern latitudes in July, August, and September. Your telescope may have come with at least two eyepieces, and you may have acquired one or ...
ATLAS lifts the Cup: discovery of a new Milky Way satellite in Crater⋆†
... population implies that star formation occurred in Crater perhaps as recently as 400 Myr ago. No globular cluster has ever accomplished the feat of prolonging its star formation by several Gyr. Therefore, if our hypothesis that the blue bright stars in Crater are blue loop giants is correct, the new ...
... population implies that star formation occurred in Crater perhaps as recently as 400 Myr ago. No globular cluster has ever accomplished the feat of prolonging its star formation by several Gyr. Therefore, if our hypothesis that the blue bright stars in Crater are blue loop giants is correct, the new ...
A COMPREHENSIVE COMPARISON OF THE SUN TO
... reason to limit our life-hunting efforts to planets orbiting Sunlike stars. As an example of the type of anthropic reasoning we are using, consider the following situation. Suppose uranium (a low-abundance element in the solar system and in the universe) was central to the biochemistry of life on Ea ...
... reason to limit our life-hunting efforts to planets orbiting Sunlike stars. As an example of the type of anthropic reasoning we are using, consider the following situation. Suppose uranium (a low-abundance element in the solar system and in the universe) was central to the biochemistry of life on Ea ...
Origin of the Chemical Elements
... The existence of CMBR was predicted by Alpher et al. (1948) as a direct consequence of the Hot Big Bang Universe of Gamow (Lamarre and Puget 2001). It was discovered by Penzias and Wilson (1965). It originates from the combination of the once free electrons and protons into neutral atoms when the te ...
... The existence of CMBR was predicted by Alpher et al. (1948) as a direct consequence of the Hot Big Bang Universe of Gamow (Lamarre and Puget 2001). It was discovered by Penzias and Wilson (1965). It originates from the combination of the once free electrons and protons into neutral atoms when the te ...
Venus and Maya - Academic Program Pages at Evergreen
... Mayan Venus Cosmology Ancient Mayans worshipped and tracked Venus’s movements for hundreds of years. ...
... Mayan Venus Cosmology Ancient Mayans worshipped and tracked Venus’s movements for hundreds of years. ...
What Can You See With a Telescope
... No asteroids were found until 1845—almost forty years later—even though groups of amateur and professional astronomers designed special sky-mapping projects to search for them. ...
... No asteroids were found until 1845—almost forty years later—even though groups of amateur and professional astronomers designed special sky-mapping projects to search for them. ...
CHEOPS Science Requirements Document
... search the whole sky and hence to find planets orbiting bright stars. Current surveys have, within their design limitations, mapped almost the whole sky and found hundreds of short period giant planets. The first dedicated space transit mission, CoRoT, was successfully launched in December 2006. It ...
... search the whole sky and hence to find planets orbiting bright stars. Current surveys have, within their design limitations, mapped almost the whole sky and found hundreds of short period giant planets. The first dedicated space transit mission, CoRoT, was successfully launched in December 2006. It ...
The Significance of Mega Stars
... expansion of consciousness to include the whole of the Milky Way galaxy, not just the Orion Arm. The famous Bayer catalog of stars compiled in 1603 by Johann Bayer assigns Greek letters to the brightest stars visible in each constellation, usually in descending order of apparent brightness (but Bay ...
... expansion of consciousness to include the whole of the Milky Way galaxy, not just the Orion Arm. The famous Bayer catalog of stars compiled in 1603 by Johann Bayer assigns Greek letters to the brightest stars visible in each constellation, usually in descending order of apparent brightness (but Bay ...
International Ultraviolet Explorer
The International Ultraviolet Explorer (IUE) was an astronomical observatory satellite primarily designed to take ultraviolet spectra. The satellite was a collaborative project between NASA, the UK Science Research Council and the European Space Agency (ESA). The mission was first proposed in early 1964, by a group of scientists in the United Kingdom, and was launched on January 26, 1978 aboard a NASA Delta rocket. The mission lifetime was initially set for 3 years, but in the end it lasted almost 18 years, with the satellite being shut down in 1996. The switch-off occurred for financial reasons, while the telescope was still functioning at near original efficiency.It was the first space observatory to be operated in real time by astronomers who visited the groundstations in the United States and Europe. Astronomers made over 104,000 observations using the IUE, of objects ranging from solar system bodies to distant quasars. Among the significant scientific results from IUE data were the first large scale studies of stellar winds, accurate measurements of the way interstellar dust absorbs light, and measurements of the supernova SN1987A which showed that it defied stellar evolution theories as they then stood. When the mission ended, it was considered the most successful astronomical satellite ever.