Winter Stargazing - Trimble County Schools
... stars from Bellatrix to Betelgeuse, and extend it outward toward the East. • About three shoulder-widths away you will ...
... stars from Bellatrix to Betelgeuse, and extend it outward toward the East. • About three shoulder-widths away you will ...
Galaxy clusters - University of Iowa Astrophysics
... source, we can figure out the total mass in the lens. This provides an independent confirmation of dark matter. • A lense can act as a huge telescope. The deepest images of the most distant galaxies are obtained with clusters acting as gravitational lenses. ...
... source, we can figure out the total mass in the lens. This provides an independent confirmation of dark matter. • A lense can act as a huge telescope. The deepest images of the most distant galaxies are obtained with clusters acting as gravitational lenses. ...
Chapter 14 The Milky Way Galaxy
... • RR Lyrae stars all have about the same luminosity; knowing their apparent magnitude allows us to calculate the distance. • Cepheids have a luminosity that is strongly correlated with the period of their oscillations; once the period is measured, the luminosity is known and we can proceed as above. ...
... • RR Lyrae stars all have about the same luminosity; knowing their apparent magnitude allows us to calculate the distance. • Cepheids have a luminosity that is strongly correlated with the period of their oscillations; once the period is measured, the luminosity is known and we can proceed as above. ...
Volume 20 Number 10 September 2012
... In 2010, observers reported the most massive stars ever seen, - it exceeded what many astronomers thought was a maximum about 150 times the mass of the Sun. The heavyweight champs resided 160,000 light-years from Earth in Radcliffe 136, a dense star cluster within the Large Magellanic Cloud, the bri ...
... In 2010, observers reported the most massive stars ever seen, - it exceeded what many astronomers thought was a maximum about 150 times the mass of the Sun. The heavyweight champs resided 160,000 light-years from Earth in Radcliffe 136, a dense star cluster within the Large Magellanic Cloud, the bri ...
Slide 1
... distances in the universe) must be far outside the Milky Way, because of its great distance (which he was able to calculate). By the way he developed the method for calculating star distance. When Hubble reported his findings the following year, astronomers realized that they had misnamed the Androm ...
... distances in the universe) must be far outside the Milky Way, because of its great distance (which he was able to calculate). By the way he developed the method for calculating star distance. When Hubble reported his findings the following year, astronomers realized that they had misnamed the Androm ...
Document
... 3. Using Stellarium to help you find the names of the zodiacal constellations and their brightest stars, fill in the chart on the reverse side. The circle is the ecliptic going through the twelve constellations indicated by big arrows. Label each big arrow with the name of the constellation and try ...
... 3. Using Stellarium to help you find the names of the zodiacal constellations and their brightest stars, fill in the chart on the reverse side. The circle is the ecliptic going through the twelve constellations indicated by big arrows. Label each big arrow with the name of the constellation and try ...
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), ...
Astronomy Day 2006: A short presentation on eclipsing binary stars
... Another reason that I am interested in these star systems is the potential for the discovery of extra-solar planets that theoretically can exist in stable orbit around the binary star pair. These might be seen through transit observations of very high inclination angle binary stars. After all, they ...
... Another reason that I am interested in these star systems is the potential for the discovery of extra-solar planets that theoretically can exist in stable orbit around the binary star pair. These might be seen through transit observations of very high inclination angle binary stars. After all, they ...
STARS
... What are stars made out of? • A star is a massive, luminous ball of plasma. • The nearest star to Earth is the Sun, which is the source of most of the energy on Earth. • Stars are big exploding balls of gas, that are mostly hydrogen and helium. • A star begins as a collapsing cloud of material comp ...
... What are stars made out of? • A star is a massive, luminous ball of plasma. • The nearest star to Earth is the Sun, which is the source of most of the energy on Earth. • Stars are big exploding balls of gas, that are mostly hydrogen and helium. • A star begins as a collapsing cloud of material comp ...
Here - Thanet Astronomy Group
... Orion. Saiph is about 720 light years away, and believed to be 20 times bigger than our Sun. ...
... Orion. Saiph is about 720 light years away, and believed to be 20 times bigger than our Sun. ...
The Galactic Super Star Cluster Westerlund 1
... expected from the integrated emission from premain sequence stars with M i<3 M. If we extrapolate from the observed stars using a Kroupa IMF, we find that Westerlund 1 is ~90 times the mass of Orion. Therefore, we would have expected diffuse emission with L x = 3x10 35 erg s-1, which is five times ...
... expected from the integrated emission from premain sequence stars with M i<3 M. If we extrapolate from the observed stars using a Kroupa IMF, we find that Westerlund 1 is ~90 times the mass of Orion. Therefore, we would have expected diffuse emission with L x = 3x10 35 erg s-1, which is five times ...
Star Sizes
... find this star is to follow the handle of the Big Dipper. The handle arc, and if you follow the arc of the handle the first bright star you see is Arcturus. Let’s compare our star to a few other well-known stars. ...
... find this star is to follow the handle of the Big Dipper. The handle arc, and if you follow the arc of the handle the first bright star you see is Arcturus. Let’s compare our star to a few other well-known stars. ...
Test #4
... 1. The location of the center of the Galaxy is determined by observations of: a) Cepheids variables, b) Globular clusters, c) The spiral arms, d) A visually bright, massive, object around which all objects in the Galaxy move. 2. What two observations of an object allow for a determination of the Mil ...
... 1. The location of the center of the Galaxy is determined by observations of: a) Cepheids variables, b) Globular clusters, c) The spiral arms, d) A visually bright, massive, object around which all objects in the Galaxy move. 2. What two observations of an object allow for a determination of the Mil ...
Round 1
... A star becomes a red giant when this happens. (runs out of hydrogen to fuse in its core → leaves the main sequence) $1600 A Type 1a supernova occurs when a white dwarf’s mass exceeds this. (1.4 M ) $2000 This prevents the collapse of the star at the center of a planetary nebula. (electron ...
... A star becomes a red giant when this happens. (runs out of hydrogen to fuse in its core → leaves the main sequence) $1600 A Type 1a supernova occurs when a white dwarf’s mass exceeds this. (1.4 M ) $2000 This prevents the collapse of the star at the center of a planetary nebula. (electron ...
Stars - Madison County Schools
... • The objects that heat and light the planets in a system • A star is a ball of plasma held together by its own gravity – Nuclear reactions occur in stars (H He) – Energy from the nuclear reactions is released as electromagnetic radiation ...
... • The objects that heat and light the planets in a system • A star is a ball of plasma held together by its own gravity – Nuclear reactions occur in stars (H He) – Energy from the nuclear reactions is released as electromagnetic radiation ...
The Universe and Galaxies - West Jefferson Local Schools
... - ________ is required for light to travel through space - light travels a little over 8 minutes from the sun to earth - the farther away an object/star is, the ________ it takes for light to get to us, and the older the light is when it gets to us = “Light is OLD” - we see the ________of other star ...
... - ________ is required for light to travel through space - light travels a little over 8 minutes from the sun to earth - the farther away an object/star is, the ________ it takes for light to get to us, and the older the light is when it gets to us = “Light is OLD” - we see the ________of other star ...
The Universe and Galaxies - West Jefferson Local Schools
... - ________ is required for light to travel through space - light travels a little over 8 minutes from the sun to earth - the farther away an object/star is, the ________ it takes for light to get to us, and the older the light is when it gets to us = “Light is OLD” - we see the ________of other star ...
... - ________ is required for light to travel through space - light travels a little over 8 minutes from the sun to earth - the farther away an object/star is, the ________ it takes for light to get to us, and the older the light is when it gets to us = “Light is OLD” - we see the ________of other star ...
Activity: Stellar Evolution Scavenger Hunt - Chandra X
... which, over time, becomes too thin to see. A massive star will explode as a type II supernova, leaving behind a neutron star or a black hole. If a white dwarf has a nearby companion, it could accrete enough mass to explode as a type Ia supernova. The “Stellar Evolution” chart enclosed in this packet ...
... which, over time, becomes too thin to see. A massive star will explode as a type II supernova, leaving behind a neutron star or a black hole. If a white dwarf has a nearby companion, it could accrete enough mass to explode as a type Ia supernova. The “Stellar Evolution” chart enclosed in this packet ...
The Stellar Luminosity Function
... visual magnitude and r is the distance in parsecs . Since the table gives the distances in light years, the formula had to be modified to M =m+5-5 logD/3.26 . Th e absolute magnitudes were then rounded to the nearest whole magnitude and then plotted. (See fig.1 .) The sun's absolute magnitude is 4.8 ...
... visual magnitude and r is the distance in parsecs . Since the table gives the distances in light years, the formula had to be modified to M =m+5-5 logD/3.26 . Th e absolute magnitudes were then rounded to the nearest whole magnitude and then plotted. (See fig.1 .) The sun's absolute magnitude is 4.8 ...
c - Fsusd
... 9) The Hertzsprung-Russell diagram graphs stars’ ______. a) absolute brightness & temperature b) apparent brightness & absolute brightness c) distance & absolute brightness d) diameter & apparent brightness ...
... 9) The Hertzsprung-Russell diagram graphs stars’ ______. a) absolute brightness & temperature b) apparent brightness & absolute brightness c) distance & absolute brightness d) diameter & apparent brightness ...
Star and Galaxies
... • Stars with masses similar to the sun evolve in essentially the same way as low-mass stars. • During their collapse from red giants to white dwarfs, medium-mass stars are thought to cast off their bloated outer layer, creating an expanding round cloud of gas called planetary nebula. ...
... • Stars with masses similar to the sun evolve in essentially the same way as low-mass stars. • During their collapse from red giants to white dwarfs, medium-mass stars are thought to cast off their bloated outer layer, creating an expanding round cloud of gas called planetary nebula. ...
Volcanoes and Igneous Activity Earth
... • Stars with masses similar to the sun evolve in essentially the same way as low-mass stars. • During their collapse from red giants to white dwarfs, medium-mass stars are thought to cast off their bloated outer layer, creating an expanding round cloud of gas called planetary nebula. ...
... • Stars with masses similar to the sun evolve in essentially the same way as low-mass stars. • During their collapse from red giants to white dwarfs, medium-mass stars are thought to cast off their bloated outer layer, creating an expanding round cloud of gas called planetary nebula. ...
Astronomy 2
... Star Brightness luminosity – depends on size & temperature apparent magnitude – as seen from Earth: brightest are ≤ 1 faintest are ≥ 6 absolute magnitude – expresses luminosity of stars as if they were all seen 32.6 lightyears from Earth (our sun = 4.8) ...
... Star Brightness luminosity – depends on size & temperature apparent magnitude – as seen from Earth: brightest are ≤ 1 faintest are ≥ 6 absolute magnitude – expresses luminosity of stars as if they were all seen 32.6 lightyears from Earth (our sun = 4.8) ...
Serpens
Serpens (""the Serpent"", Greek Ὄφις) is a constellation of the northern hemisphere. One of the 48 constellations listed by the 2nd-century astronomer Ptolemy, it remains one of the 88 modern constellations defined by the International Astronomical Union. It is unique among the modern constellations in being split into two non-contiguous parts, Serpens Caput (Serpent's Head) to the west and Serpens Cauda (Serpent's Tail) to the east. Between these two halves lies the constellation of Ophiuchus, the ""Serpent-Bearer"". In figurative representations, the body of the serpent is represented as passing behind Ophiuchus between Mu Serpentis in Serpens Caput and Nu Serpentis in Serpens Cauda.The brightest star in Serpens is the red giant star Alpha Serpentis, or Unukalhai, in Serpens Caput, with an apparent magnitude of 2.63. Also located in Serpens Caput are the naked-eye globular cluster Messier 5 and the naked-eye variables R Serpentis and Tau4 Serpentis. Notable extragalactic objects include Seyfert's Sextet, one of the densest galaxy clusters known; Arp 220, the prototypical ultraluminous infrared galaxy; and Hoag's Object, the most famous of the very rare class of galaxies known as ring galaxies.Part of the Milky Way's galactic plane passes through Serpens Cauda, which is therefore rich in galactic deep-sky objects, such as the Eagle Nebula (IC 4703) and its associated star cluster Messier 16. The nebula measures 70 light-years by 50 light-years and contains the Pillars of Creation, three dust clouds that became famous for the image taken by the Hubble Space Telescope. Other striking objects include the Red Square Nebula, one of the few objects in astronomy to take on a square shape; and Westerhout 40, a massive nearby star-forming region consisting of a molecular cloud and an H II region.