GEARS Workshop Monday - Georgia Southern University
... our own Sun, have found a remarkable object where the nuclear reactor that once powered it has only just shut down. This star, the hottest known white dwarf, H1504+65, seems to have been stripped of its entire outer regions during its death throes leaving behind the core that formed its power plant. ...
... our own Sun, have found a remarkable object where the nuclear reactor that once powered it has only just shut down. This star, the hottest known white dwarf, H1504+65, seems to have been stripped of its entire outer regions during its death throes leaving behind the core that formed its power plant. ...
First Light for May, 2001 - South Bay Astronomical Society
... Even before the sunset, I was able to find the Moon, Venus and Jupiter. Not a lot of detail to be seen on Jupiter with it being so low and with low clouds on the horizon. Once it was fully dark, the observing really got underway. First up was Saturn, beautiful as always but a bit shaky with air turb ...
... Even before the sunset, I was able to find the Moon, Venus and Jupiter. Not a lot of detail to be seen on Jupiter with it being so low and with low clouds on the horizon. Once it was fully dark, the observing really got underway. First up was Saturn, beautiful as always but a bit shaky with air turb ...
100 Binocular Deep Sky Objects
... in a group, but usually 2 objects in a group. Seeing DSOs in groups makes observing that much more enjoyable. Many of these objects are challenging and may not be seen unless observing with large binoculars or in very dark skies. In some cases I discuss what can be seen in various sizes of binocular ...
... in a group, but usually 2 objects in a group. Seeing DSOs in groups makes observing that much more enjoyable. Many of these objects are challenging and may not be seen unless observing with large binoculars or in very dark skies. In some cases I discuss what can be seen in various sizes of binocular ...
Stellar populations
... The locus of stars which have just started to shine • Subgiant branch Stars that have just exhausted H in their cores, and are now moving off the main sequence • Red giants Evolved stars in upper right-hand part of diagram with either He cores, or they are burning He to C and O in their cores. They ...
... The locus of stars which have just started to shine • Subgiant branch Stars that have just exhausted H in their cores, and are now moving off the main sequence • Red giants Evolved stars in upper right-hand part of diagram with either He cores, or they are burning He to C and O in their cores. They ...
How many stars are in the Milky Way Galaxy?
... the Milky Way while B is what the Milky Way “might” look like if we were far away looking back at our own galaxy from some other galaxy. ...
... the Milky Way while B is what the Milky Way “might” look like if we were far away looking back at our own galaxy from some other galaxy. ...
Constellations - Sierra Star Gazers
... in the sky. In fact it is somewhat nearer to us, at a distance of 5,000 light years. M20 is considerably smaller than the Lagoon. Look for an object about 20’ in extent. In my 4” scope at 23x, I can view both M8 and M20 in the same field of view. Commonly known as the Trifid Nebula, close inspection ...
... in the sky. In fact it is somewhat nearer to us, at a distance of 5,000 light years. M20 is considerably smaller than the Lagoon. Look for an object about 20’ in extent. In my 4” scope at 23x, I can view both M8 and M20 in the same field of view. Commonly known as the Trifid Nebula, close inspection ...
1 LABORATORY 1: DIGITAL IMAGING WITH DS9 MATERIALS
... objects: http://www.seds.org/messier. (click on “look at star clusters” which is on the left below “Messier Object of the Week” and “Look at Nebulae”). There are two types of clusters listed: open and globular clusters. We are interested in the open clusters, which typically are “closer” to Earth. T ...
... objects: http://www.seds.org/messier. (click on “look at star clusters” which is on the left below “Messier Object of the Week” and “Look at Nebulae”). There are two types of clusters listed: open and globular clusters. We are interested in the open clusters, which typically are “closer” to Earth. T ...
The correct answers are written in bold, italic and underlined. The
... • At the very bottom of the main sequence, massive stars being cool because of their great mass • At the very top of the main sequence, massive stars being very hot and active • In the middle of the main sequence, with very hot but less massive stars positioned higher and massive red giant stars pos ...
... • At the very bottom of the main sequence, massive stars being cool because of their great mass • At the very top of the main sequence, massive stars being very hot and active • In the middle of the main sequence, with very hot but less massive stars positioned higher and massive red giant stars pos ...
Student Worksheet - Indiana University Astronomy
... The brightness of stars in IC 4665 for the wavelength regions B, V, I, J, H, and K are included in the table below. These measurements are published in the astronomical literature, as noted in the references below the table. Wavelengths are measured in nanometers (nm, 10-9 meters). Visible light has ...
... The brightness of stars in IC 4665 for the wavelength regions B, V, I, J, H, and K are included in the table below. These measurements are published in the astronomical literature, as noted in the references below the table. Wavelengths are measured in nanometers (nm, 10-9 meters). Visible light has ...
The Hubble Space Telescope - the first 10 years
... The Hubble Deep Field (150 orbits of data) • It only covers 1millionth of the sky but: – It’s the deepest image ever taken of the Universe looking back to when the Universe was: 1 billion years old (I.e., 10% of its current age) – In it we see that the most distant galaxies are very irregular unlike ...
... The Hubble Deep Field (150 orbits of data) • It only covers 1millionth of the sky but: – It’s the deepest image ever taken of the Universe looking back to when the Universe was: 1 billion years old (I.e., 10% of its current age) – In it we see that the most distant galaxies are very irregular unlike ...
Chapter 1 The Discovery of Open Clusters - Willmann-Bell
... not think to record specific groups in his notes. The latter is also suggested in the first part of the following paragraph where Galileo describes his observations of the nebulae: But it is not only in the Milky Way that whitish clouds are seen; several patches of similar aspect shine with faint li ...
... not think to record specific groups in his notes. The latter is also suggested in the first part of the following paragraph where Galileo describes his observations of the nebulae: But it is not only in the Milky Way that whitish clouds are seen; several patches of similar aspect shine with faint li ...
26.4 Groups of Stars
... Sometimes the smaller star in a binary star is too dim to be seen easily from Earth but can still be detected from the motion of the other star. If one star passes in front of the other, blocking some of the light from reaching Earth, the star system is called an eclipsing binary. The brightness of ...
... Sometimes the smaller star in a binary star is too dim to be seen easily from Earth but can still be detected from the motion of the other star. If one star passes in front of the other, blocking some of the light from reaching Earth, the star system is called an eclipsing binary. The brightness of ...
1.2.43The stellar populations of the Milky Way
... stars, which is consistent with star formation in the spheroid ceasing long ago. Because this population is so old, only low-mass stars (which have long lifetimes) still shine as main sequence stars burning hydrogen in their cores. The more massive stars that formed at the same time as the surviving ...
... stars, which is consistent with star formation in the spheroid ceasing long ago. Because this population is so old, only low-mass stars (which have long lifetimes) still shine as main sequence stars burning hydrogen in their cores. The more massive stars that formed at the same time as the surviving ...
Brown et al. 2008 Studying Resolved Stellar
... Being the oldest known stellar aggregates, accurately age-dating globular clusters can potentially answer two additional intriguing questions: a) did they form before or after cosmic re-ionization, and in case what part did they play in it? And, b) otherwise, did they form at the time of the formati ...
... Being the oldest known stellar aggregates, accurately age-dating globular clusters can potentially answer two additional intriguing questions: a) did they form before or after cosmic re-ionization, and in case what part did they play in it? And, b) otherwise, did they form at the time of the formati ...
Stars: Their Life and Afterlife
... with masses of 104 – 106 MŸ. They are not necessarily gravitationally bound and, like all clouds in the galaxy, are transient structures with lifetimes on the scale of 10’s of millions of years. Their lifetimes are linked to the time scales of stellar formation, which seems natural since the formati ...
... with masses of 104 – 106 MŸ. They are not necessarily gravitationally bound and, like all clouds in the galaxy, are transient structures with lifetimes on the scale of 10’s of millions of years. Their lifetimes are linked to the time scales of stellar formation, which seems natural since the formati ...
Measuring Stars
... The double cluster in Perseus, H-R diagram shows that most young stars has not reached the MS and only most massive stars has left the MS, it is very young probably 10-15 million years ...
... The double cluster in Perseus, H-R diagram shows that most young stars has not reached the MS and only most massive stars has left the MS, it is very young probably 10-15 million years ...
stars & galaxies
... our home iN The sTars… • The Milky Way has a diameter of about 100,000 light years. • The nucleus is 2000 light years thick. • Our sun is located 30,000 light years from the nucleus. • It takes the sun 200 million years to ...
... our home iN The sTars… • The Milky Way has a diameter of about 100,000 light years. • The nucleus is 2000 light years thick. • Our sun is located 30,000 light years from the nucleus. • It takes the sun 200 million years to ...
January 2015 - Newbury Astronomical Society
... red dots shining in the pillars are new stars starting to ‘peep’ out of the gas and dust clouds of the nebula. The pillars are being shaped by intense ultraviolet radiation from large powerful young stars just out of view to the top of the image. Stars form in nebulae as gravity pulls atoms together ...
... red dots shining in the pillars are new stars starting to ‘peep’ out of the gas and dust clouds of the nebula. The pillars are being shaped by intense ultraviolet radiation from large powerful young stars just out of view to the top of the image. Stars form in nebulae as gravity pulls atoms together ...
Stellar Spire in the Eagle Nebula
... gas that reside in chaotic neighborhoods, where energy from newborn stars sculpts fantasy-like landscapes in the gas. The tower is a giant incubator for these newborn stars. A torrent of ultraviolet light from a band of massive, hot, young stars [off the top of the image] is eroding the pillar. The ...
... gas that reside in chaotic neighborhoods, where energy from newborn stars sculpts fantasy-like landscapes in the gas. The tower is a giant incubator for these newborn stars. A torrent of ultraviolet light from a band of massive, hot, young stars [off the top of the image] is eroding the pillar. The ...
Apparent magnitude
... Newly formed and young stars in the galactic plane in circular orbits (in one year ~1 M new stars) The metallicity of young stars increases Open star clusters, interstellar matter Also an “outer” disc of hydrogen (15 000 ly away) and a large disc of warm gas ( ~10 000K) High-velocity clouds (HVC), ...
... Newly formed and young stars in the galactic plane in circular orbits (in one year ~1 M new stars) The metallicity of young stars increases Open star clusters, interstellar matter Also an “outer” disc of hydrogen (15 000 ly away) and a large disc of warm gas ( ~10 000K) High-velocity clouds (HVC), ...
The Milky Way Galaxy
... To determine the rotation curve of the Galaxy, we will introduce a more convenient coordinate system, called the Galactic coordinate system. Note that the plane of the solar system is not the same as the plane of the Milky Way disk, and the Earth itself is tipped with respect to the plane of the sol ...
... To determine the rotation curve of the Galaxy, we will introduce a more convenient coordinate system, called the Galactic coordinate system. Note that the plane of the solar system is not the same as the plane of the Milky Way disk, and the Earth itself is tipped with respect to the plane of the sol ...
*Studying Complex Star-Forming Fields: Rosette Nebula and Monoceros Loop by Chris Hathaway and Anthony Kuchera
... 209 recently born stars in a 12° x 12° field in Northern Monoceros. The photometryderived parameters allowed us to obtain homogeneous distances to groups and layers of stars in this field out to a distance of 2 kpc. We presented new distance estimates for the young open clusters NGC 2244 and NGC 226 ...
... 209 recently born stars in a 12° x 12° field in Northern Monoceros. The photometryderived parameters allowed us to obtain homogeneous distances to groups and layers of stars in this field out to a distance of 2 kpc. We presented new distance estimates for the young open clusters NGC 2244 and NGC 226 ...
May 2010 - Pomona Valley Amateur Astronomers
... Ron likes to see old photons but the question has been raised, “How old are they?” The first bit of information we need is the redshift, the value of “Z.” What is it? Hydrogen is the most abundant element in the outer reaches of any star. It is simply a proton with an electron orbiting it. Quantum P ...
... Ron likes to see old photons but the question has been raised, “How old are they?” The first bit of information we need is the redshift, the value of “Z.” What is it? Hydrogen is the most abundant element in the outer reaches of any star. It is simply a proton with an electron orbiting it. Quantum P ...
A105 Stars and Galaxies
... What about Massive Stars? • Massive stars continue to generate energy by nuclear reactions until they have converted all the hydrogen and helium in their cores into iron. • Once the core is iron, no more energy can be generated • The core collapses and the star explodes ...
... What about Massive Stars? • Massive stars continue to generate energy by nuclear reactions until they have converted all the hydrogen and helium in their cores into iron. • Once the core is iron, no more energy can be generated • The core collapses and the star explodes ...
Open cluster
An open cluster, also known as galactic cluster, is a group of up to a few thousand stars that were formed from the same giant molecular cloud and have roughly the same age. More than 1,100 open clusters have been discovered within the Milky Way Galaxy, and many more are thought to exist. They are loosely bound by mutual gravitational attraction and become disrupted by close encounters with other clusters and clouds of gas as they orbit the galactic center, resulting in a migration to the main body of the galaxy as well as a loss of cluster members through internal close encounters. Open clusters generally survive for a few hundred million years, with the most massive ones surviving for a few billion years. In contrast, the more massive globular clusters of stars exert a stronger gravitational attraction on their members, and can survive for longer. Open clusters have been found only in spiral and irregular galaxies, in which active star formation is occurring.Young open clusters may still be contained within the molecular cloud from which they formed, illuminating it to create an H II region. Over time, radiation pressure from the cluster will disperse the molecular cloud. Typically, about 10% of the mass of a gas cloud will coalesce into stars before radiation pressure drives the rest of the gas away.Open clusters are key objects in the study of stellar evolution. Because the cluster members are of similar age and chemical composition, their properties (such as distance, age, metallicity and extinction) are more easily determined than they are for isolated stars. A number of open clusters, such as the Pleiades, Hyades or the Alpha Persei Cluster are visible with the naked eye. Some others, such as the Double Cluster, are barely perceptible without instruments, while many more can be seen using binoculars or telescopes. The Wild Duck Cluster, M11, is an example.