November - Hawaiian Astronomical Society
... “lace like.” Unlike most open clusters, NGC 7789 is a rich cluster, which is best observed with higher powers. Jane notes that at 200x there is a noticeable dark spot in the center of the cluster. I found that even at 300x the cluster only looks more interesting. M11, the “Wild Duck” cluster reacts ...
... “lace like.” Unlike most open clusters, NGC 7789 is a rich cluster, which is best observed with higher powers. Jane notes that at 200x there is a noticeable dark spot in the center of the cluster. I found that even at 300x the cluster only looks more interesting. M11, the “Wild Duck” cluster reacts ...
Chapter 13 Neutron Stars and Black Holes
... There are several other black hole candidates as well, with characteristics similar to Cygnus X-1. The centers of many galaxies contain supermassive black holes – about 1 million solar masses. ...
... There are several other black hole candidates as well, with characteristics similar to Cygnus X-1. The centers of many galaxies contain supermassive black holes – about 1 million solar masses. ...
Space Science - Madison County Schools
... outward exploding as a supernova. Its core becoming a neutron star that is so dense that one teaspoon would weigh more than 600 million metric tons on Earth. If a star is so massive that the remaining core from a supernova is more than three solar masses, the gravity near this mass is so strong it c ...
... outward exploding as a supernova. Its core becoming a neutron star that is so dense that one teaspoon would weigh more than 600 million metric tons on Earth. If a star is so massive that the remaining core from a supernova is more than three solar masses, the gravity near this mass is so strong it c ...
Homework #2 1. There are two ways to estimate the energy carried
... longer than the gravitational free-fall time of the cloud, tf f ≈ 1/ Ghρi, where hρi is the mean density of the cloud. What happens if tKH < tf f ? b) Estimate the critical radius Rc (in R ) at which tKH ≈ tf f , i.e, at which KH contraction begins, for a given cloud of mass M (in M ). Assume, as ...
... longer than the gravitational free-fall time of the cloud, tf f ≈ 1/ Ghρi, where hρi is the mean density of the cloud. What happens if tKH < tf f ? b) Estimate the critical radius Rc (in R ) at which tKH ≈ tf f , i.e, at which KH contraction begins, for a given cloud of mass M (in M ). Assume, as ...
1.3 Lifecycle of stars
... Evolution of a Sun-Like Star The helium flash: The pressure within the helium core is almost totally due to “electron degeneracy”—two electrons cannot be in the same quantum state, so the core cannot contract beyond a certain point. This pressure is almost independent of temperature— when the heliu ...
... Evolution of a Sun-Like Star The helium flash: The pressure within the helium core is almost totally due to “electron degeneracy”—two electrons cannot be in the same quantum state, so the core cannot contract beyond a certain point. This pressure is almost independent of temperature— when the heliu ...
The Milky Way - Montgomery College
... Observing Neutral Hydrogen: The 21-cm (radio) line (I) Electrons in the ground state of neutral hydrogen have slightly ...
... Observing Neutral Hydrogen: The 21-cm (radio) line (I) Electrons in the ground state of neutral hydrogen have slightly ...
here - British Astronomical Association
... • Your data, when combined with other observers’ data can be valuable and unique, and can make a real contribution to science. • Professionals need your observations • Finally, you make many friends all over the world sharing your ...
... • Your data, when combined with other observers’ data can be valuable and unique, and can make a real contribution to science. • Professionals need your observations • Finally, you make many friends all over the world sharing your ...
Stars - WhatisOutThere
... Around how many stars are in the sky each night? The number of stars in the sky still remains a mystery to this day, because there are just too many to count. Stars are not spread out everywhere in space but are grouped together in galaxies. Instead of counting the stars individually, scientists lo ...
... Around how many stars are in the sky each night? The number of stars in the sky still remains a mystery to this day, because there are just too many to count. Stars are not spread out everywhere in space but are grouped together in galaxies. Instead of counting the stars individually, scientists lo ...
The gorilla connection
... far from this separation, especially low-mass planets, will not be seen. Despite this limitation, more than a third of the stars in the sample of Gould et al.1 have planets, a fraction that is likely to be an underestimate, yet one that is already several times larger than the fraction found by Dopp ...
... far from this separation, especially low-mass planets, will not be seen. Despite this limitation, more than a third of the stars in the sample of Gould et al.1 have planets, a fraction that is likely to be an underestimate, yet one that is already several times larger than the fraction found by Dopp ...
Closest ever exoplanet is potentially habitable
... Proxima Centauri, the closest star to the Sun, has a rocky, Earth-sized planet located in the star's habitable zone, where liquid water can exist on the surface. This major discovery was made by an international team of researchers including Julien Morin from the Laboratoire Univers et Particules de ...
... Proxima Centauri, the closest star to the Sun, has a rocky, Earth-sized planet located in the star's habitable zone, where liquid water can exist on the surface. This major discovery was made by an international team of researchers including Julien Morin from the Laboratoire Univers et Particules de ...
Multiple Choice, continued
... • The galaxy in which we live, the Milky Way, is a spiral galaxy in which the sun is one of hundreds of billions of stars. • Two irregular galaxies, the Large Magellanic Cloud and Small Magellanic Cloud, are our closest neighbors. • These three galaxies are called the Local Group. ...
... • The galaxy in which we live, the Milky Way, is a spiral galaxy in which the sun is one of hundreds of billions of stars. • Two irregular galaxies, the Large Magellanic Cloud and Small Magellanic Cloud, are our closest neighbors. • These three galaxies are called the Local Group. ...
Lecture 1
... star (Star A), out to the Distant Stars. Which of the distant stars would appear closest to Star A in your night sky in January. Circle this distant star and label it Jan. Repeat Question 1 for July and label the distant star “July”. In the box below, the same distant stars are shown as you would se ...
... star (Star A), out to the Distant Stars. Which of the distant stars would appear closest to Star A in your night sky in January. Circle this distant star and label it Jan. Repeat Question 1 for July and label the distant star “July”. In the box below, the same distant stars are shown as you would se ...
Document
... 2. Microlensing on isolated stellar mass BHs • There are several good candidates • But it is necessary to find the black hole ITSELF! 3. Exotic emission mechanisms • As all other exotics: interesting, but not very probable • If it works, then GLAST will show us isolated BHs 4. Runaway stars • A rare ...
... 2. Microlensing on isolated stellar mass BHs • There are several good candidates • But it is necessary to find the black hole ITSELF! 3. Exotic emission mechanisms • As all other exotics: interesting, but not very probable • If it works, then GLAST will show us isolated BHs 4. Runaway stars • A rare ...
Sky-High 2013 - Irish Astronomical Society
... of the Earth from the Sun). It is convenient for solar system measurements. ...
... of the Earth from the Sun). It is convenient for solar system measurements. ...
The Search for Exoplanets - Worcester Polytechnic Institute
... being large gas giants like Jupiter or Saturn, while others are small and rocky, like Earth and Mars. Exoplanets are almost always found to be gravitationally bound to a stellar system, however, there is at least some evidence to suggest that there may be a small minority of “rogue exoplanets” that ...
... being large gas giants like Jupiter or Saturn, while others are small and rocky, like Earth and Mars. Exoplanets are almost always found to be gravitationally bound to a stellar system, however, there is at least some evidence to suggest that there may be a small minority of “rogue exoplanets” that ...
Chap4-Timing
... Fate of planetary systems during the red giant phase. All planets within the final extent of the red giant envelope will be engulfed and migrate inwards. Planets further out will have greater chance of survival, migrating outwards as mass is lost from central star. In mass is loss instantane ...
... Fate of planetary systems during the red giant phase. All planets within the final extent of the red giant envelope will be engulfed and migrate inwards. Planets further out will have greater chance of survival, migrating outwards as mass is lost from central star. In mass is loss instantane ...
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.