Star Light, Star Bright
... students that our star, the Sun, is a great distance from Earth, but that the next closest star is 272 times that distance from Earth! Write 149,600,000 km = Earth to Sun on the board; under it, write 40,678,000,000 km = Earth to Alpha Centauri. Tell students that Alpha Centauri is actually a triple ...
... students that our star, the Sun, is a great distance from Earth, but that the next closest star is 272 times that distance from Earth! Write 149,600,000 km = Earth to Sun on the board; under it, write 40,678,000,000 km = Earth to Alpha Centauri. Tell students that Alpha Centauri is actually a triple ...
Outline2a
... scatters light. Dust in space can be seen in silhouette, as it blocks out the light from more distant stars. ...
... scatters light. Dust in space can be seen in silhouette, as it blocks out the light from more distant stars. ...
Exploring the cosmos
... He devised a system of galaxy classification that is still widely used today. These galaxy images were taken at the Mount Wilson Observatory in California and show some of the different types of spiral galaxy. ...
... He devised a system of galaxy classification that is still widely used today. These galaxy images were taken at the Mount Wilson Observatory in California and show some of the different types of spiral galaxy. ...
1 Introduction - University of Amsterdam
... similar to low-mass stars, much of the physics controlling the formation process remains also figuratively speaking ‘covered in clouds’ (e.g., Zinnecker & Yorke 2007; Krumholz 2014a). One striking aspect that awaits explanation is why all massive stars appear to form as part of multiple systems (San ...
... similar to low-mass stars, much of the physics controlling the formation process remains also figuratively speaking ‘covered in clouds’ (e.g., Zinnecker & Yorke 2007; Krumholz 2014a). One striking aspect that awaits explanation is why all massive stars appear to form as part of multiple systems (San ...
doc - Jnoodle
... from b = L / 4d2 ) we still need the surface area A. We assume that the star is shaped like a sphere so if we find its volume V = (4/3)r3 we can get the radius of the star r and then its surface A = 4r2 (Notice the conceptual difference between the surface area of a spherical radiation source and ...
... from b = L / 4d2 ) we still need the surface area A. We assume that the star is shaped like a sphere so if we find its volume V = (4/3)r3 we can get the radius of the star r and then its surface A = 4r2 (Notice the conceptual difference between the surface area of a spherical radiation source and ...
13.5 The HR Diagram By the early 1900s, astronomers had learned
... and 27% helium, with a trace of the heavier elements. Most have surface temperatures between about 3000 and 30,000 K and masses between about 0.1 and 30 M⊙. The HR diagram offers a simple, pictorial way to summarize stellar properties. Most stars lie along the main sequence, with hotter stars being ...
... and 27% helium, with a trace of the heavier elements. Most have surface temperatures between about 3000 and 30,000 K and masses between about 0.1 and 30 M⊙. The HR diagram offers a simple, pictorial way to summarize stellar properties. Most stars lie along the main sequence, with hotter stars being ...
20_LectureOutline
... elements far beyond carbon in its core, leading to a very different fate. Its path across the H-R diagram is essentially a straight line—it stays at just about the same luminosity as it cools off. Eventually the star dies in a violent explosion called a supernova. ...
... elements far beyond carbon in its core, leading to a very different fate. Its path across the H-R diagram is essentially a straight line—it stays at just about the same luminosity as it cools off. Eventually the star dies in a violent explosion called a supernova. ...
Chapter 8: The Pennsylvanian Period in Alabama: Looking Up
... (Fig. 8.5), or the popular asterism known as the Big Dipper? During a human lifetime, the stars seem fixed. We see the same constellations that were seen by the ancient Egyptians 5000 years ago. But immutability is an illusion. If we were to follow the course of the sky over a period of 310 million ...
... (Fig. 8.5), or the popular asterism known as the Big Dipper? During a human lifetime, the stars seem fixed. We see the same constellations that were seen by the ancient Egyptians 5000 years ago. But immutability is an illusion. If we were to follow the course of the sky over a period of 310 million ...
The Pennsylvanian Period in Alabama: Looking Up Astronomy and
... for us it is sufficient to know that within the uncertainty of the distance, the light we are receiving from these galaxies left them during the Westphalian. The cluster's early Pennsylvanian light reaches us today, and the cluster is so far away that one needs a substantial telescope to see it wel ...
... for us it is sufficient to know that within the uncertainty of the distance, the light we are receiving from these galaxies left them during the Westphalian. The cluster's early Pennsylvanian light reaches us today, and the cluster is so far away that one needs a substantial telescope to see it wel ...
the magellanic clouds newsletter - Keele University Astrophysics
... square degrees that have been monitored for eight years during the third phase of the OGLE survey. This is the largest set of such variables containing 6138 objects, of which 777 are contact and 5361 non-contact binaries. The estimated completeness of this sample is around 82%. We analyze the statis ...
... square degrees that have been monitored for eight years during the third phase of the OGLE survey. This is the largest set of such variables containing 6138 objects, of which 777 are contact and 5361 non-contact binaries. The estimated completeness of this sample is around 82%. We analyze the statis ...
Our Galaxy, the Milky Way Galaxy
... We do not know where the black holes came from Black holes do not hold galaxies together and are light compared to the rest of the galaxy ...
... We do not know where the black holes came from Black holes do not hold galaxies together and are light compared to the rest of the galaxy ...
December
... Fully one-third of the 1st magnitude stars visible in the sky (seven of twenty-one) are in the Winter Circle with Sirius, Procyon, Pollux - toss in 2nd magnitude Castor - Capella, Aldebaran, and Rigel on the periphery, and Betelgeuse located off-center. Although somewhat flattened, and thus more ell ...
... Fully one-third of the 1st magnitude stars visible in the sky (seven of twenty-one) are in the Winter Circle with Sirius, Procyon, Pollux - toss in 2nd magnitude Castor - Capella, Aldebaran, and Rigel on the periphery, and Betelgeuse located off-center. Although somewhat flattened, and thus more ell ...
スライド 1 - STScI
... Figure 2 is the I-K vs. K color-magnitude diagram of variable stars in the LMC. Relevant data is taken from Ita et al. (2004). The horizontal line shows the 10 sigma detection limit for our monitoring survey at K band, which is about 15.5 magnitude. The right diagonal line stands for the 10 sigma de ...
... Figure 2 is the I-K vs. K color-magnitude diagram of variable stars in the LMC. Relevant data is taken from Ita et al. (2004). The horizontal line shows the 10 sigma detection limit for our monitoring survey at K band, which is about 15.5 magnitude. The right diagonal line stands for the 10 sigma de ...
H-R Diagram
... H-R diagram – a graphical plot showing the relationship between a star’s luminosity and its surface temperature. o ...
... H-R diagram – a graphical plot showing the relationship between a star’s luminosity and its surface temperature. o ...
International Reporter, India 07-24-06 A Glimpse at the Future of Our Sun
... “The typical belief is that stars have to be symmetric gas balls,” said Ragland, an interferometer specialist. “But 30 percent of these red giants showed asymmetry, which has implications for the last stages of stellar evolution, when stars like the Sun are evolving into planetary nebulae.” The resu ...
... “The typical belief is that stars have to be symmetric gas balls,” said Ragland, an interferometer specialist. “But 30 percent of these red giants showed asymmetry, which has implications for the last stages of stellar evolution, when stars like the Sun are evolving into planetary nebulae.” The resu ...
ASTRONOMY WEBQUEST…… EXPLORE THE UNIVERSE
... Date February 23, 2012 Answer all of the questions by typing them on this document. Save your work and then attach this document to an e-mail to me. I am Mr. Aguilar, your 8th grade science teacher. 1. If your home is your universe, how would you like your home to be? Would you like your home to be ...
... Date February 23, 2012 Answer all of the questions by typing them on this document. Save your work and then attach this document to an e-mail to me. I am Mr. Aguilar, your 8th grade science teacher. 1. If your home is your universe, how would you like your home to be? Would you like your home to be ...
The Sun and the Solar System
... smaller(?!) • D~d: different objects of the same size(?!), the further away, the larger(?!) Q: the Sun’s distance from Earth is about 400 times the Moon’s distance. How large is the Sun compared with the Moon? ...
... smaller(?!) • D~d: different objects of the same size(?!), the further away, the larger(?!) Q: the Sun’s distance from Earth is about 400 times the Moon’s distance. How large is the Sun compared with the Moon? ...
final fate of a massive star
... Chandrasekhar probed the question of final fate of stars such as the Sun. He showed that such a star, on exhausting its internal nuclear fuel, would stabilize as a `white dwarf', which is about a thousand kilometers in size. The British masters were in disbelief, refused to accept his results, sayin ...
... Chandrasekhar probed the question of final fate of stars such as the Sun. He showed that such a star, on exhausting its internal nuclear fuel, would stabilize as a `white dwarf', which is about a thousand kilometers in size. The British masters were in disbelief, refused to accept his results, sayin ...
슬라이드 1
... We present UBVI CCD photometry of unstudied open cluster Teutsch7. This object is listed in the open cluster catalog(Dias et al 2002), but only their coordinate and size were known. The observation was performed at maidanak observatory, and we find about 420 stars of cluster's member in V filter pho ...
... We present UBVI CCD photometry of unstudied open cluster Teutsch7. This object is listed in the open cluster catalog(Dias et al 2002), but only their coordinate and size were known. The observation was performed at maidanak observatory, and we find about 420 stars of cluster's member in V filter pho ...
Hipparcos
Hipparcos was a scientific satellite of the European Space Agency (ESA), launched in 1989 and operated until 1993. It was the first space experiment devoted to precision astrometry, the accurate measurement of the positions of celestial objects on the sky. This permitted the accurate determination of proper motions and parallaxes of stars, allowing a determination of their distance and tangential velocity. When combined with radial-velocity measurements from spectroscopy, this pinpointed all six quantities needed to determine the motion of stars. The resulting Hipparcos Catalogue, a high-precision catalogue of more than 118,200 stars, was published in 1997. The lower-precision Tycho Catalogue of more than a million stars was published at the same time, while the enhanced Tycho-2 Catalogue of 2.5 million stars was published in 2000. Hipparcos ' follow-up mission, Gaia, was launched in 2013.The word ""Hipparcos"" is an acronym for High precision parallax collecting satellite and also a reference to the ancient Greek astronomer Hipparchus of Nicaea, who is noted for applications of trigonometry to astronomy and his discovery of the precession of the equinoxes.