X-ray binaries
... The latest large catalogue (Li et al. arXiv: 0707.0544) includes 187 galactic and Magellanic Clouds LMXBs with NSs and BHs as accreting components. Donors can be WDs, or normal low-mass stars (main sequence or sub-giants). Many sources are found in globular clusters. Also there are more and more LMX ...
... The latest large catalogue (Li et al. arXiv: 0707.0544) includes 187 galactic and Magellanic Clouds LMXBs with NSs and BHs as accreting components. Donors can be WDs, or normal low-mass stars (main sequence or sub-giants). Many sources are found in globular clusters. Also there are more and more LMX ...
How we found about BLACK HOLES
... If you were to take the mass of our Sun and squeeze it into a body no larger than Sirius B, the density would be very high indeed. (The density of an object tells us how much mass is squeezed into a particular volume.) A cubic centimeter of the material of Sirius B, if it was brought to Earth, would ...
... If you were to take the mass of our Sun and squeeze it into a body no larger than Sirius B, the density would be very high indeed. (The density of an object tells us how much mass is squeezed into a particular volume.) A cubic centimeter of the material of Sirius B, if it was brought to Earth, would ...
Population synthesis view of gravitational waves - Astro-PF
... We do not simulate all the stars only a small fraction that may produce compact object binaries ...
... We do not simulate all the stars only a small fraction that may produce compact object binaries ...
– 1 – 1. Cosmochronology
... clusters, they are thus quite uncertain due to systematic modeling uncertainties, not to random observational errors. Another feature of stellar evolution which is somewhat more promising is the population of white dwarfs in clusters. These have no or very little nuclear activity, their luminosity i ...
... clusters, they are thus quite uncertain due to systematic modeling uncertainties, not to random observational errors. Another feature of stellar evolution which is somewhat more promising is the population of white dwarfs in clusters. These have no or very little nuclear activity, their luminosity i ...
Standards
... Diagramming the Stars - H-R diagram – worksheet/activity Have students complete the diagramming the stars worksheet to help them see where different stars are located on the H-R diagram. Students could complete the worksheet as groups or assign each group a question and have them complete the works ...
... Diagramming the Stars - H-R diagram – worksheet/activity Have students complete the diagramming the stars worksheet to help them see where different stars are located on the H-R diagram. Students could complete the worksheet as groups or assign each group a question and have them complete the works ...
The Sun
... We also know that the Earth rotates from west to east because the sun rises in the east, moves through the southern sky (in the northern hemisphere), and sets every day in the west. ...
... We also know that the Earth rotates from west to east because the sun rises in the east, moves through the southern sky (in the northern hemisphere), and sets every day in the west. ...
THE GRAND SEXTILE: Tool for Personal and Spiritual Evolution
... Water is a universal solvent, entering into more combinations than any known element, and the chief coagulate of Nature. Water crystallizes at an angle of 60°, It is represented by two interlaced triangles, each composed of two oxygen atoms and one atom of hydrogen – the formula for water. Water is ...
... Water is a universal solvent, entering into more combinations than any known element, and the chief coagulate of Nature. Water crystallizes at an angle of 60°, It is represented by two interlaced triangles, each composed of two oxygen atoms and one atom of hydrogen – the formula for water. Water is ...
Pegasus - Interactive Stars
... They do not undermine conventional astrology, but to add a lost dimension to it. The Earliest Astrologers and The Sacred, Living Sphere We have grown so used to seeing the planets and the zodiac, alone, as powerful that it can come as a surprise to find that for the early practitioners of astrology, ...
... They do not undermine conventional astrology, but to add a lost dimension to it. The Earliest Astrologers and The Sacred, Living Sphere We have grown so used to seeing the planets and the zodiac, alone, as powerful that it can come as a surprise to find that for the early practitioners of astrology, ...
The Formation of Massive Star Systems by Accretion
... to continue lead to small multiple systems. ...
... to continue lead to small multiple systems. ...
On the correlation between stellar chromospheric flux and the
... show signatures of condensations absorbing in Hα, that are located a few stellar radii above the surface (Collier Cameron & Robinson 1989a,b). Prominence-like structures were also observed in CoRoT-2 (Czesla et al. 2012). In late-type stars that are accompanied by close-in planets, different magneti ...
... show signatures of condensations absorbing in Hα, that are located a few stellar radii above the surface (Collier Cameron & Robinson 1989a,b). Prominence-like structures were also observed in CoRoT-2 (Czesla et al. 2012). In late-type stars that are accompanied by close-in planets, different magneti ...
Lab 2: An OpenGL Solar System
... astronomical database. Some of the constellations are highlighted. The camera moves smoothly and shows the most important features of the application (sun/planets/moons, animated orbits, stars, constellations). Note that your task is not to create an accurate planetarium tool! 4 In the example above ...
... astronomical database. Some of the constellations are highlighted. The camera moves smoothly and shows the most important features of the application (sun/planets/moons, animated orbits, stars, constellations). Note that your task is not to create an accurate planetarium tool! 4 In the example above ...
Cygnus X-1
... hundredth of a second bursts. It is also been proven that Cygnus X-1 is smaller than the Earth. Strangely enough, Cygnus X-1 has a companion star called HDE 226868. HDE 226868 is a supergiant with a temperature around 31,000 K. After extremely close observations of HDE 226868, it appears that its sp ...
... hundredth of a second bursts. It is also been proven that Cygnus X-1 is smaller than the Earth. Strangely enough, Cygnus X-1 has a companion star called HDE 226868. HDE 226868 is a supergiant with a temperature around 31,000 K. After extremely close observations of HDE 226868, it appears that its sp ...
Andy Fraknoi
... How does Frank Drake define a “civilization”? What was Carl Sagan's “trick” with the Drake equation? What is SETI? How does SETI (and project Phoenix) search for aliens? The fastest speed we can communicate is _______ Why are radio waves so convenient for space communication? What is the fastest tur ...
... How does Frank Drake define a “civilization”? What was Carl Sagan's “trick” with the Drake equation? What is SETI? How does SETI (and project Phoenix) search for aliens? The fastest speed we can communicate is _______ Why are radio waves so convenient for space communication? What is the fastest tur ...
SWA (Sliding Window Algorithm) V1.0 User·s Guide
... without aberration. The precision should be worth with the real PSF, but it depends on the correction used that has not been tested yet ; Magnitude precision is 0.15 mag. at 20 magnitude, and 0.3 mag. at 21. A bias can be observed from magnitude 20.5, just because it is under the detection limit : s ...
... without aberration. The precision should be worth with the real PSF, but it depends on the correction used that has not been tested yet ; Magnitude precision is 0.15 mag. at 20 magnitude, and 0.3 mag. at 21. A bias can be observed from magnitude 20.5, just because it is under the detection limit : s ...
Absolute magnitude of type Ia supernovae
... last stage of a star’s evolution. Since its brightness temporarily reach to a few hundreds million times of our sun’s, we can find it from fairly far distance. It rarely occurs once in a hundred years at a galaxy, but there are many galaxies in the Universe, therefore by observing everywhere, a supe ...
... last stage of a star’s evolution. Since its brightness temporarily reach to a few hundreds million times of our sun’s, we can find it from fairly far distance. It rarely occurs once in a hundred years at a galaxy, but there are many galaxies in the Universe, therefore by observing everywhere, a supe ...
zenith - Gardner-Webb University
... c. Earth is tilted, so the Sun is closer to one hemisphere than the other, which causes one hemisphere to be in winter and the other in summer. d. The energy received at Earth from the Sun changes throughout the year providing more energy to one hemisphere than the other. ...
... c. Earth is tilted, so the Sun is closer to one hemisphere than the other, which causes one hemisphere to be in winter and the other in summer. d. The energy received at Earth from the Sun changes throughout the year providing more energy to one hemisphere than the other. ...
pierrehumbert_lecture_1
... Reduced reflectivity contrast between ice/snow and ocean makes it harder for a planet to freeze over and turn into a Snowball ...
... Reduced reflectivity contrast between ice/snow and ocean makes it harder for a planet to freeze over and turn into a Snowball ...
Living with a Red Dwarf - Center for Space and Habitability (CSH)
... Reduced reflectivity contrast between ice/snow and ocean makes it harder for a planet to freeze over and turn into a Snowball ...
... Reduced reflectivity contrast between ice/snow and ocean makes it harder for a planet to freeze over and turn into a Snowball ...
Our Place In Space
... Our Place In Space Table of Contents Crossword Puzzle and Clues ........................................................................................................ 1 ...
... Our Place In Space Table of Contents Crossword Puzzle and Clues ........................................................................................................ 1 ...
The Sun - Our Star
... At a sunspot maximum, most spots occur about 30° north or south of the equator. As the sunspot cycle progresses, the spots are seen closer and closer to the Sun’s equator. When the spots reach the equator, the cycle is at a sunspot minimum and begins again. Location and relative number of su ...
... At a sunspot maximum, most spots occur about 30° north or south of the equator. As the sunspot cycle progresses, the spots are seen closer and closer to the Sun’s equator. When the spots reach the equator, the cycle is at a sunspot minimum and begins again. Location and relative number of su ...
models
... an average distance of 1 AU. How long would it take to complete an orbit and where would it spend most of its time? ...
... an average distance of 1 AU. How long would it take to complete an orbit and where would it spend most of its time? ...
Chapter 10
... 3. Tombaugh used a blink comparator to compare two photos of the sky taken a few days apart. A moving object such as a planet will appear to jump from one spot to another as the observer quickly changes views from the first photo to the second. 4. Pluto was discovered 6° from where Lowell had predic ...
... 3. Tombaugh used a blink comparator to compare two photos of the sky taken a few days apart. A moving object such as a planet will appear to jump from one spot to another as the observer quickly changes views from the first photo to the second. 4. Pluto was discovered 6° from where Lowell had predic ...
Aquarius (constellation)
Aquarius is a constellation of the zodiac, situated between Capricornus and Pisces. Its name is Latin for ""water-carrier"" or ""cup-carrier"", and its symbol is 20px (Unicode ♒), a representation of water.Aquarius is one of the oldest of the recognized constellations along the zodiac (the sun's apparent path). It was one of the 48 constellations listed by the 2nd century AD astronomer Ptolemy, and it remains one of the 88 modern constellations. It is found in a region often called the Sea due to its profusion of constellations with watery associations such as Cetus the whale, Pisces the fish, and Eridanus the river.