distance to the centre of the Milky Way.
... After Shapley: we knew we were about 2/3 of the way out from the very centre of a huge stellar system, now known to be about 100,000 light years in diameter. Note that Shapley actually overestimated the distances somewhat, because he didn’t fully understand the effects of the obscuring dust. But thi ...
... After Shapley: we knew we were about 2/3 of the way out from the very centre of a huge stellar system, now known to be about 100,000 light years in diameter. Note that Shapley actually overestimated the distances somewhat, because he didn’t fully understand the effects of the obscuring dust. But thi ...
Hertzsprung-Russell Diagram—key to understanding properties of stars. 26 Sept
... – September 26-28, Fri & Sat at 8:00 pm, Sun at 4:00 pm. – A show highlighting the current sky, spectacular gatherings of Venus with the moon and other planets in coming months. See what Galileo saw through his telescope 400 years ago— the Milky Way and the Pleiades, details on the moon, the four mo ...
... – September 26-28, Fri & Sat at 8:00 pm, Sun at 4:00 pm. – A show highlighting the current sky, spectacular gatherings of Venus with the moon and other planets in coming months. See what Galileo saw through his telescope 400 years ago— the Milky Way and the Pleiades, details on the moon, the four mo ...
If you wish to a copy of this months Night Sky News
... sequence stars, about twice the size of the sun. They can be separated with a good small telescope. Castor B is now also known to be a spectroscopic binary whose components are even closer, at only 4.5 million km distance and having an orbital period of only three days. A distant 9th mag. companion ...
... sequence stars, about twice the size of the sun. They can be separated with a good small telescope. Castor B is now also known to be a spectroscopic binary whose components are even closer, at only 4.5 million km distance and having an orbital period of only three days. A distant 9th mag. companion ...
d 2
... • Some have names that go back to ancient times (e.g. Castor and Pollux, Greek mythology) • Some were named by Arab astronomers (e.g. Aldebaran, Algol, etc.) • Since the 17th century we use a scheme that lists stars by constellation – in order of their apparent brightness – labeled alphabetically in ...
... • Some have names that go back to ancient times (e.g. Castor and Pollux, Greek mythology) • Some were named by Arab astronomers (e.g. Aldebaran, Algol, etc.) • Since the 17th century we use a scheme that lists stars by constellation – in order of their apparent brightness – labeled alphabetically in ...
SGL 9 NGC Galaxy magnitude 9/10 observing challenge Up for
... Object 3 – Leo triplet (Taki page 50) No not the famous one. Look half way between delta and theta Leo and then a fraction left. This group NGC3605 / NGC 3607 and NGC 3608 are part of the Leo II group of galaxies. NGC 3605 is however in the background and NGC 3607/8 (both magnitude 9) are interactin ...
... Object 3 – Leo triplet (Taki page 50) No not the famous one. Look half way between delta and theta Leo and then a fraction left. This group NGC3605 / NGC 3607 and NGC 3608 are part of the Leo II group of galaxies. NGC 3605 is however in the background and NGC 3607/8 (both magnitude 9) are interactin ...
Stars and Constellations
... The imaginary line made by Orion's belt toward the northwest passes just under the horn of Taurus, the bull. The horns of Taurus form a V-shape in the sky and contain the star, Aldebaran. Pleiades, the seven sisters, are located on the shoulder of Taurus. Usually only six stars can readily be seen; ...
... The imaginary line made by Orion's belt toward the northwest passes just under the horn of Taurus, the bull. The horns of Taurus form a V-shape in the sky and contain the star, Aldebaran. Pleiades, the seven sisters, are located on the shoulder of Taurus. Usually only six stars can readily be seen; ...
ppt - Serbian Virtual Observatory - astronomical observatory belgrade
... gravitationally bound or, at least, how probable this is. Why probable, because of data lack, very often the data body is very scarce. There exist criteria aimed at establishing the probability of being bound for two stars observed very close to each other on the celestial sphere. Many of these crit ...
... gravitationally bound or, at least, how probable this is. Why probable, because of data lack, very often the data body is very scarce. There exist criteria aimed at establishing the probability of being bound for two stars observed very close to each other on the celestial sphere. Many of these crit ...
stars and planets
... There are around 200 billion stars in the Milky Way alone. VY Canis Majoris is the largest known star in our galaxy, if this star was in the center of our solar system it would reach the orbit of Saturn. One of the smallest known stars in the galaxy is VB 10, it is only around 20% larger than Jupite ...
... There are around 200 billion stars in the Milky Way alone. VY Canis Majoris is the largest known star in our galaxy, if this star was in the center of our solar system it would reach the orbit of Saturn. One of the smallest known stars in the galaxy is VB 10, it is only around 20% larger than Jupite ...
The Mass Assembly of Galaxies
... There is a cluster of B stars in the central 1’’ of the galaxy, the so-called S-cluster. These high proper motion stars - in particular star S2 - show that Sgr A* is a black-hole of 3-4 million solar masses. Large numbers of young stars, in particular O supergiants and WR stars are observed within 2 ...
... There is a cluster of B stars in the central 1’’ of the galaxy, the so-called S-cluster. These high proper motion stars - in particular star S2 - show that Sgr A* is a black-hole of 3-4 million solar masses. Large numbers of young stars, in particular O supergiants and WR stars are observed within 2 ...
July 2013 - Joliet Junior College
... Saturn is low in the sky in mid-evening. Follow the curve of the handle on the Big Dipper, past the bright star Arcturus, and Saturn will look like a yellow star below Arcturus and to the left of another bright star -Spica. On July 16th the moon will be close below Saturn. Mercury, Jupiter and Mars ...
... Saturn is low in the sky in mid-evening. Follow the curve of the handle on the Big Dipper, past the bright star Arcturus, and Saturn will look like a yellow star below Arcturus and to the left of another bright star -Spica. On July 16th the moon will be close below Saturn. Mercury, Jupiter and Mars ...
Death of Low Mass Stars 8 Solar Masses or less
... • The resistance of electrons from being squeezed together (electromagnetic repulsion) keeps gravity from compressing it further. Called Electron Degeneracy • The black dwarf will continue to exist at temps close to absolute zero forever…. ...
... • The resistance of electrons from being squeezed together (electromagnetic repulsion) keeps gravity from compressing it further. Called Electron Degeneracy • The black dwarf will continue to exist at temps close to absolute zero forever…. ...
Life and Death Of A Star - EarthSpaceScience
... Remnants of a massive Giant Star • neutron star – a neutron’s stars gravity is so high that electrons are forced into the protons making them all neutrons • When a neutron star first forms it spins giving off bursts of radio waves – Pulsar • If a star is big enough (15 solar mass) the ...
... Remnants of a massive Giant Star • neutron star – a neutron’s stars gravity is so high that electrons are forced into the protons making them all neutrons • When a neutron star first forms it spins giving off bursts of radio waves – Pulsar • If a star is big enough (15 solar mass) the ...
![Lectures 10 & 11 powerpoint (stellar formation) [movie below]](http://s1.studyres.com/store/data/008083226_1-fec717da713794a7feea61d4eec0ceb1-300x300.png)
Lectures 10 & 11 powerpoint (stellar formation) [movie below]
... gas can remain ionized because of very low density. ...
... gas can remain ionized because of very low density. ...
The Celestial Sphere - Department of Physics and Astronomy
... Every star can be located by its RA and Dec. Ra in units of hours minutes and seconds, Dec in units of degree minutes and seconds ...
... Every star can be located by its RA and Dec. Ra in units of hours minutes and seconds, Dec in units of degree minutes and seconds ...
File - Etna FFA Agriculture
... impacted by the rotation of Earth? Sheep are seasonal breeders, with the majority being short-day breeders that cycle in the fall and lamb in the spring of the year. However, some breeds of sheep will cycle in the spring and have lambs in the fall. Through the eye of the sheep, its brain perce ...
... impacted by the rotation of Earth? Sheep are seasonal breeders, with the majority being short-day breeders that cycle in the fall and lamb in the spring of the year. However, some breeds of sheep will cycle in the spring and have lambs in the fall. Through the eye of the sheep, its brain perce ...
The Northern Winter Constellations - Science
... The Constellations of the Winter Sky If you live in the northern latitudes and you scan the sky from the southern horizon to the region overhead, you should be able to see the following constellations on a clear winter night: Orion the Hunter, Canis Major the Great Dog, Canis Minor the Little Dog, T ...
... The Constellations of the Winter Sky If you live in the northern latitudes and you scan the sky from the southern horizon to the region overhead, you should be able to see the following constellations on a clear winter night: Orion the Hunter, Canis Major the Great Dog, Canis Minor the Little Dog, T ...
The Sun-Earth-Moon System
... there is no air or water • So, craters and other markings are not “erased” over time • Craters were caused by collisions with meteorites. • Meteorites, known as asteroids when they are still in space, are pieces of planets left over from the formation of the solar system. ...
... there is no air or water • So, craters and other markings are not “erased” over time • Craters were caused by collisions with meteorites. • Meteorites, known as asteroids when they are still in space, are pieces of planets left over from the formation of the solar system. ...
Ursa Major
Ursa Major /ˈɜrsə ˈmeɪdʒər/ (also known as the Great Bear and Charles' Wain) is a constellation in the northern celestial hemisphere. One of the 48 constellations listed by Ptolemy (second century AD), it remains one of the 88 modern constellations. It can be visible throughout the year in most of the northern hemisphere. Its name, Latin for ""the greater (or larger) she-bear"", stands as a reference to and in direct contrast with Ursa Minor, ""the smaller she-bear"", with which it is frequently associated in mythology and amateur astronomy. The constellation's most recognizable asterism, a group of seven relatively bright stars commonly known as the ""Big Dipper"", ""the Wagon"" or ""the Plough"" (among others), both mimicks the shape of the lesser bear (the ""Little Dipper"") and is commonly used as a navigational pointer towards the current northern pole star, Polaris in Ursa Minor. The Big Dipper and the constellation as a whole have mythological significance in numerous world cultures, usually as a symbol of the north.The third largest constellation in the sky, Ursa Major is home to many deep-sky objects including seven Messier objects, four other NGC objects and I Zwicky 18, the youngest known galaxy in the visible universe.