Molecular Line Surveys of Cygnus X: The 13CO and C18O View
... array at the FCRAO 14 m telescope and cover 35 square degrees at 45'' resolution. While 13CO traces the large scale distribution of cold and warm gas throughout the region, the high column density filaments and clumps are outlined by C18O emission. We compare the global properties of the different v ...
... array at the FCRAO 14 m telescope and cover 35 square degrees at 45'' resolution. While 13CO traces the large scale distribution of cold and warm gas throughout the region, the high column density filaments and clumps are outlined by C18O emission. We compare the global properties of the different v ...
To Measure the Sky: An Introduction to Observational Astronomy.
... This is another situation in which the r-coordinate becomes superfluous. The shepherd will find it difficult or impossible to determine the r coordinate for the objects in the sky. He knows the direction of a star but not its distance from the origin (which he will naturally take to be himself). Astron ...
... This is another situation in which the r-coordinate becomes superfluous. The shepherd will find it difficult or impossible to determine the r coordinate for the objects in the sky. He knows the direction of a star but not its distance from the origin (which he will naturally take to be himself). Astron ...
MS Word version
... The following sequence of directions are steps an instructor might choose to follow in demonstrating the Eclipsing Binary Simulator in a classroom situation. We provide these suggestions with appropriate questions (shown in bold italics) to pose to the class as an aid in promoting interactivity. We ...
... The following sequence of directions are steps an instructor might choose to follow in demonstrating the Eclipsing Binary Simulator in a classroom situation. We provide these suggestions with appropriate questions (shown in bold italics) to pose to the class as an aid in promoting interactivity. We ...
Lives of Stars - Amazon Web Services
... Neutron Stars After a supergiant explodes, some of the material from the star is left behind. This material may form a neutron star. Neutron stars are the remains of high-mass stars. They are even smaller and denser than white dwarfs. A neutron star may contain as much as three times the mass of the ...
... Neutron Stars After a supergiant explodes, some of the material from the star is left behind. This material may form a neutron star. Neutron stars are the remains of high-mass stars. They are even smaller and denser than white dwarfs. A neutron star may contain as much as three times the mass of the ...
A Chandra Observation of the Massive Star-Forming
... from an evaporating gaseous globule (EGG) for the first time A significant population of X-ray emitting low mass stars (~700) detected, increasing the cluster known members by a factor of 40 ...
... from an evaporating gaseous globule (EGG) for the first time A significant population of X-ray emitting low mass stars (~700) detected, increasing the cluster known members by a factor of 40 ...
Fixed Stars
... An introduction for illustrations and text about some fixed stars and their energies, which are significant to the evolutions in our Solar System, inclusive Earth. Some fundamental facts are necessary for people, to grasp the idea of how the Universe can be, and is, a living Being, maintained by Law ...
... An introduction for illustrations and text about some fixed stars and their energies, which are significant to the evolutions in our Solar System, inclusive Earth. Some fundamental facts are necessary for people, to grasp the idea of how the Universe can be, and is, a living Being, maintained by Law ...
Deep Space Mystery Note Form 2
... Binary stars are when there are two stars and they revolve around each other. In these systems supernovas occur also. Stars up to eight times the mass of our sun usually evolve into white dwarfs. A star that is condensed to this size has a very strong gravitational pull. With that gravity, ...
... Binary stars are when there are two stars and they revolve around each other. In these systems supernovas occur also. Stars up to eight times the mass of our sun usually evolve into white dwarfs. A star that is condensed to this size has a very strong gravitational pull. With that gravity, ...
Photometry - University of Groningen
... Photometric standard systems • Goal: putting mags on common scale • Standard system= – telescope+filter+detector ...
... Photometric standard systems • Goal: putting mags on common scale • Standard system= – telescope+filter+detector ...
18 Throughout history people around the world have looked up at
... general sequence of events will remain the same. Share other “sky lore” stories and activities to learn more about Polaris and the circumpolar constellations with your students using one of the resources listed on page 20. At the end of the activity, make sure students understand that the stars do n ...
... general sequence of events will remain the same. Share other “sky lore” stories and activities to learn more about Polaris and the circumpolar constellations with your students using one of the resources listed on page 20. At the end of the activity, make sure students understand that the stars do n ...
PODEX – PhOtometric Data EXtractor
... apertures and background annulus of all used stars can be displayed in the aperture field to control the proper definition of the aperture radii. middle right: The grey– scaled lines indicate the instrumental light curves of all used stars. The black symbols represent the corresponding reference lig ...
... apertures and background annulus of all used stars can be displayed in the aperture field to control the proper definition of the aperture radii. middle right: The grey– scaled lines indicate the instrumental light curves of all used stars. The black symbols represent the corresponding reference lig ...
Final response Authors comments_overview GOMOS
... planning and implementation of future stellar occultation instruments, which are sure to follow. Based on this, I recommend publication in ACP, contingent on the resolution of the same two issues described by an earlier review. First, the length of the paper should be reduced. This can be readily ac ...
... planning and implementation of future stellar occultation instruments, which are sure to follow. Based on this, I recommend publication in ACP, contingent on the resolution of the same two issues described by an earlier review. First, the length of the paper should be reduced. This can be readily ac ...
Stellar Evolution Guiding Questions Stars Evolve
... • The most massive protostars to form out of a dark nebula rapidly become main sequence O and B stars • They emit strong ultraviolet radiation that ionizes hydrogen in the surrounding cloud, thus creating the reddish emission nebulae called H II regions • Ultraviolet radiation and stellar winds from ...
... • The most massive protostars to form out of a dark nebula rapidly become main sequence O and B stars • They emit strong ultraviolet radiation that ionizes hydrogen in the surrounding cloud, thus creating the reddish emission nebulae called H II regions • Ultraviolet radiation and stellar winds from ...
Introduction to the HR Diagram
... the X-axis is the B-V or V-R color index and sometimes it’s the spectral type of the star. All of these are equivalent and interchangeable measures of surface temperature. The X-axis is plotted backwards (for historical reasons) in that zero (zero temperature) is at the far right of the graph. So ...
... the X-axis is the B-V or V-R color index and sometimes it’s the spectral type of the star. All of these are equivalent and interchangeable measures of surface temperature. The X-axis is plotted backwards (for historical reasons) in that zero (zero temperature) is at the far right of the graph. So ...
Images from the Las Cumbres Observatory Global Telescope
... the 22nd nearest star system to our own. The closest approach was about 13,000 years ago, when the star was within 3.67 parsecs. It is now in the process of moving away from the solar system. Luyten’s Star was named after Willem Luyten, the Dutch-American astronomer who first determined the star’s p ...
... the 22nd nearest star system to our own. The closest approach was about 13,000 years ago, when the star was within 3.67 parsecs. It is now in the process of moving away from the solar system. Luyten’s Star was named after Willem Luyten, the Dutch-American astronomer who first determined the star’s p ...
Birth of Stars
... turning to energy in the process This rate of hydrogen use implies that eventually the Sun (and all other stars) will run out of central fuel ...
... turning to energy in the process This rate of hydrogen use implies that eventually the Sun (and all other stars) will run out of central fuel ...
Archaeology of the Milky Way - Max-Planck
... a well like marbles, and the gas compacted to form the first stars and galaxies. Without the midwifery of the dark matter, there would probably be no galaxies or stars. According to the conventional school of thought, the large galaxies like our Milky Way didn’t form to full size. Rather, there were ...
... a well like marbles, and the gas compacted to form the first stars and galaxies. Without the midwifery of the dark matter, there would probably be no galaxies or stars. According to the conventional school of thought, the large galaxies like our Milky Way didn’t form to full size. Rather, there were ...
Gaps
... • Fast HB rotation, although maybe not present in all clusters, is a fairly common feature. ...
... • Fast HB rotation, although maybe not present in all clusters, is a fairly common feature. ...
The Evening Sky Map
... 29 Last Quarter Moon at 17:44 UT. 30 Mercury at greatest elongation, 20° west of Sun (morning sky) at 9h UT. ...
... 29 Last Quarter Moon at 17:44 UT. 30 Mercury at greatest elongation, 20° west of Sun (morning sky) at 9h UT. ...
Hipparcos
Hipparcos was a scientific satellite of the European Space Agency (ESA), launched in 1989 and operated until 1993. It was the first space experiment devoted to precision astrometry, the accurate measurement of the positions of celestial objects on the sky. This permitted the accurate determination of proper motions and parallaxes of stars, allowing a determination of their distance and tangential velocity. When combined with radial-velocity measurements from spectroscopy, this pinpointed all six quantities needed to determine the motion of stars. The resulting Hipparcos Catalogue, a high-precision catalogue of more than 118,200 stars, was published in 1997. The lower-precision Tycho Catalogue of more than a million stars was published at the same time, while the enhanced Tycho-2 Catalogue of 2.5 million stars was published in 2000. Hipparcos ' follow-up mission, Gaia, was launched in 2013.The word ""Hipparcos"" is an acronym for High precision parallax collecting satellite and also a reference to the ancient Greek astronomer Hipparchus of Nicaea, who is noted for applications of trigonometry to astronomy and his discovery of the precession of the equinoxes.