what are stars made of?
... Gravity brings global clusters together Global clusters are large groups of stars that are held together by their own gravity. These groups of stars are very old and often have millions of members. ...
... Gravity brings global clusters together Global clusters are large groups of stars that are held together by their own gravity. These groups of stars are very old and often have millions of members. ...
Complete the “Assess Your Understanding” including
... and becomes a _____________________. A white dwarf is about the size of Earth but a million times more dense than the sun. It ________________________ from leftover energy. After billions of years, the leftover energy is gone; the white dwarf _________________________________________________________ ...
... and becomes a _____________________. A white dwarf is about the size of Earth but a million times more dense than the sun. It ________________________ from leftover energy. After billions of years, the leftover energy is gone; the white dwarf _________________________________________________________ ...
Planetarium Key Points
... The stars seem numberless and there are actually more than 2 billions of stars in the system we live in (Milky Way), but only 3000 stars are visible at naked eye What we see is NOT what it is actually, the response of our eye is logarithmic not linear All celestial objects seem at the same dis ...
... The stars seem numberless and there are actually more than 2 billions of stars in the system we live in (Milky Way), but only 3000 stars are visible at naked eye What we see is NOT what it is actually, the response of our eye is logarithmic not linear All celestial objects seem at the same dis ...
10.1 Introduction
... This approach is adequate if, for example, we are interested in reproducing the stellar mass-luminosity relationship (Figure 4.8), or the Main Sequence of hydrogen burning stars in the luminosity-temperature diagram (Figure 3.6). Of course, the implicit assumption in homologous stellar models is tha ...
... This approach is adequate if, for example, we are interested in reproducing the stellar mass-luminosity relationship (Figure 4.8), or the Main Sequence of hydrogen burning stars in the luminosity-temperature diagram (Figure 3.6). Of course, the implicit assumption in homologous stellar models is tha ...
All_Stars
... energy into thermal energy and heats up. The pressure in the gas increases as the particles in the gas move faster and faster in random directions. This pressure will push outwards against the gravitational forces. At the same time the gas cloud will be losing thermal energy through radiation so thi ...
... energy into thermal energy and heats up. The pressure in the gas increases as the particles in the gas move faster and faster in random directions. This pressure will push outwards against the gravitational forces. At the same time the gas cloud will be losing thermal energy through radiation so thi ...
Chapter 18 The Bizarre Stellar Graveyard What is a white dwarf
... – A black hole is a massive object whose radius is so small that the escape velocity exceeds the speed of light ...
... – A black hole is a massive object whose radius is so small that the escape velocity exceeds the speed of light ...
Photoelectric Photometry of the Pleiades
... The computer program you will use is a realistic simulation of a UBV photometer attached to a moderate sized research telescope. The telescope is controlled by a computer that allows you to move from star to star and make measurements. Different filters can be selected for each observation, and the ...
... The computer program you will use is a realistic simulation of a UBV photometer attached to a moderate sized research telescope. The telescope is controlled by a computer that allows you to move from star to star and make measurements. Different filters can be selected for each observation, and the ...
ASTR1102-002 Potentially useful facts and mathematical relations
... If the star “Alpha Centauri A” (see Table 1) were moved twice as far away from us, how much brighter/fainter would it become as viewed on the night sky? a. “Alpha Centauri A” would become half as bright. b. “Alpha Centauri A” would become one-fourth as bright. c. “Alpha Centauri A” would become twic ...
... If the star “Alpha Centauri A” (see Table 1) were moved twice as far away from us, how much brighter/fainter would it become as viewed on the night sky? a. “Alpha Centauri A” would become half as bright. b. “Alpha Centauri A” would become one-fourth as bright. c. “Alpha Centauri A” would become twic ...
Accretion
... • Material transferred has high angular momentum so must lose it before accreting => disk forms • Gas loses angular momentum through collisions, shocks, viscosity and magnetic fields: kinetic energy converted into heat and radiated. • Matter sinks deeper into gravity of compact object ...
... • Material transferred has high angular momentum so must lose it before accreting => disk forms • Gas loses angular momentum through collisions, shocks, viscosity and magnetic fields: kinetic energy converted into heat and radiated. • Matter sinks deeper into gravity of compact object ...
Extra-Solar Planets
... Searching for Earth-like planets The smallest planet found so far has a mass of about 2 Earth masses. A 5 Earth mass planet appears to be near the edge-on of the habitable zone, so it could have liquid water on its surface. The next step is to search for evidence of life on this planet (e.g., oxyge ...
... Searching for Earth-like planets The smallest planet found so far has a mass of about 2 Earth masses. A 5 Earth mass planet appears to be near the edge-on of the habitable zone, so it could have liquid water on its surface. The next step is to search for evidence of life on this planet (e.g., oxyge ...
Small images
... they were handed down through the Greeks and Arabs. Few pictorial records of the ancient constellation figures have survived, but in the Almagest AD 150, Ptolemy catalogued the positions of 1,022 of the brightest stars both in terms of celestial latitude and longitude, and of their places in 48 cons ...
... they were handed down through the Greeks and Arabs. Few pictorial records of the ancient constellation figures have survived, but in the Almagest AD 150, Ptolemy catalogued the positions of 1,022 of the brightest stars both in terms of celestial latitude and longitude, and of their places in 48 cons ...
Ch 3 PPT - Blountstown Middle School
... • When a star’s hydrogen supply is nearly gone, the star leaves the main sequence and begins the next stage of its life cycle. • All stars form in the same way, but stars die in different ways, depending on their ...
... • When a star’s hydrogen supply is nearly gone, the star leaves the main sequence and begins the next stage of its life cycle. • All stars form in the same way, but stars die in different ways, depending on their ...
Relation Between the Luminosity of the Star at Different
... decrease in the luminosity and then an increase. This may be explained by the fact that in the Naked Helium stage, the star loses much of its outer surface to the stellar winds. The mass decreases as only the helium core is left behind. And since mass is directly proportional to the luminosity hence ...
... decrease in the luminosity and then an increase. This may be explained by the fact that in the Naked Helium stage, the star loses much of its outer surface to the stellar winds. The mass decreases as only the helium core is left behind. And since mass is directly proportional to the luminosity hence ...
Chapter 10. Stellar Spectra
... diagrams. For example, the optically visible lines in Helium also arise from excited states, but the energy needed to excite those states is much higher than the energy needed to get HI to the n=2 level. Hence, Helium is often hard to see in stars. Only the hottest stars (O and B stars) show lines o ...
... diagrams. For example, the optically visible lines in Helium also arise from excited states, but the energy needed to excite those states is much higher than the energy needed to get HI to the n=2 level. Hence, Helium is often hard to see in stars. Only the hottest stars (O and B stars) show lines o ...
The Dawn of Distant Skies
... ideas for investigating exoplanet atmospheres and sped things front of its star, in what is known as a transit. Yet at the time of up dramatically. By 2001 observers had identified sodium in the those first discoveries nearly two decades ago, few astrophysiatmosphere of one exoplanet. Since then, th ...
... ideas for investigating exoplanet atmospheres and sped things front of its star, in what is known as a transit. Yet at the time of up dramatically. By 2001 observers had identified sodium in the those first discoveries nearly two decades ago, few astrophysiatmosphere of one exoplanet. Since then, th ...
LAB #3 - GEOCITIES.ws
... LAB. You will begin lab with a short quiz on these questions. What are Magnitudes? Because what we know about stars is due solely to our analysis of their light, it is very important to develop further the idea of stellar magnitude, or how bright a star is. When the Greeks scientist Hipparcos determ ...
... LAB. You will begin lab with a short quiz on these questions. What are Magnitudes? Because what we know about stars is due solely to our analysis of their light, it is very important to develop further the idea of stellar magnitude, or how bright a star is. When the Greeks scientist Hipparcos determ ...
December
... Mini-Cas. ½° asterism with remarkable resemblance to the constellation Cassiopeia. Also Little Queen. The Lozenge is a small diamond formed from three stars Eltanin, Grumium, and Rastaban (Gamma, Xi, and Beta Draconis) - in the head of Draco and one - Iota Herculis - in the foot of Hercules. Cephus ...
... Mini-Cas. ½° asterism with remarkable resemblance to the constellation Cassiopeia. Also Little Queen. The Lozenge is a small diamond formed from three stars Eltanin, Grumium, and Rastaban (Gamma, Xi, and Beta Draconis) - in the head of Draco and one - Iota Herculis - in the foot of Hercules. Cephus ...
スライド 1 - STScI
... monitoring an area of 3 square degrees along the bar in the LMC, and also an area of 1 square degree in the central part of the SMC. In the last 10 years, we observed these areas about 80-90 and 100-110 times for LMC and SMC, respectively. As a result, we obtained time series data with more than 3,0 ...
... monitoring an area of 3 square degrees along the bar in the LMC, and also an area of 1 square degree in the central part of the SMC. In the last 10 years, we observed these areas about 80-90 and 100-110 times for LMC and SMC, respectively. As a result, we obtained time series data with more than 3,0 ...
Today`s Powerpoint
... temperature from spectrum (black-body curve or spectral lines), then find surface area, then find radius (sphere surface area is 4 p R2) ...
... temperature from spectrum (black-body curve or spectral lines), then find surface area, then find radius (sphere surface area is 4 p R2) ...
Lyra
Lyra (/ˈlaɪərə/; Latin for lyre, from Greek λύρα) is a small constellation. It is one of 48 listed by the 2nd century astronomer Ptolemy, and is one of the 88 constellations recognized by the International Astronomical Union. Lyra was often represented on star maps as a vulture or an eagle carrying a lyre, and hence sometimes referred to as Aquila Cadens or Vultur Cadens. Beginning at the north, Lyra is bordered by Draco, Hercules, Vulpecula, and Cygnus. Lyra is visible from the northern hemisphere from spring through autumn, and nearly overhead, in temperate latitudes, during the summer months. From the southern hemisphere, it is visible low in the northern sky during the winter months.The lucida or brightest star—and one of the brightest stars in the sky—is the white main sequence star Vega, a corner of the Summer Triangle. Beta Lyrae is the prototype of a class of stars known as Beta Lyrae variables, binary stars so close to each other that they become egg-shaped and material flows from one to the other. Epsilon Lyrae, known informally as the Double Double, is a complex multiple star system. Lyra also hosts the Ring Nebula, the second-discovered and best-known planetary nebula.