Dark Matter
... Decide whether each of the following statements makes sense (is clearly true) or does not make sense (is clearly false). Explain your reasoning thoroughly. #5. “The white dwarf at the center of the Helix Nebula has a mass three times the mass of our Sun.” #6. “The pulsation period of a pulsar appear ...
... Decide whether each of the following statements makes sense (is clearly true) or does not make sense (is clearly false). Explain your reasoning thoroughly. #5. “The white dwarf at the center of the Helix Nebula has a mass three times the mass of our Sun.” #6. “The pulsation period of a pulsar appear ...
Ch. 28 Sec. 1
... orbits a point between it and the Sun called the center of mass. Just as the balance point on a seesaw is closer to the heavier box, the center of mass between two orbiting bodies is closer to the more ...
... orbits a point between it and the Sun called the center of mass. Just as the balance point on a seesaw is closer to the heavier box, the center of mass between two orbiting bodies is closer to the more ...
Astronomy Problems – Color Index Nov. 2011
... The "U" band at 360 nm The "B" band at 440 nm The "V" band at 540 nm The "color index" of a star is defined as the magnitude in the B filter, minus the magnitude in the V filter. Color Index = B-V, where B and V refer to the magnitude of a star in those colors. Consider a star that appears red ...
... The "U" band at 360 nm The "B" band at 440 nm The "V" band at 540 nm The "color index" of a star is defined as the magnitude in the B filter, minus the magnitude in the V filter. Color Index = B-V, where B and V refer to the magnitude of a star in those colors. Consider a star that appears red ...
Our Star - the Sun
... Distances to the nearer stars can be determined by parallax, the apparent shift of a star against the background stars observed as the Earth moves along its orbit Parallax measurements made from orbit, above the blurring effects of the atmosphere, are much more accurate than those made with Earth-ba ...
... Distances to the nearer stars can be determined by parallax, the apparent shift of a star against the background stars observed as the Earth moves along its orbit Parallax measurements made from orbit, above the blurring effects of the atmosphere, are much more accurate than those made with Earth-ba ...
Exercises - Leiden Observatory
... period - we may roughly estimate the average density of the Star. The sun has been observed to oscillate with a period of minutes, white dwarfs with periods of a few tens of seconds. Estimate the average density for the Sun and for white dwarfs. (d) Comparison. i. ...
... period - we may roughly estimate the average density of the Star. The sun has been observed to oscillate with a period of minutes, white dwarfs with periods of a few tens of seconds. Estimate the average density for the Sun and for white dwarfs. (d) Comparison. i. ...
Bang To Sol - Transcript
... hydrogen and helium nuclei and the first atoms were formed. Suddenly, light could race thru the universe without bumping into charged particles and the universe became transparent and dark -- filled mostly with clouds of hydrogen and helium gas. The light released at that time is still visible today ...
... hydrogen and helium nuclei and the first atoms were formed. Suddenly, light could race thru the universe without bumping into charged particles and the universe became transparent and dark -- filled mostly with clouds of hydrogen and helium gas. The light released at that time is still visible today ...
White Dwarfs - Chandra X
... limit—it will collapse. In a binary star system this could happen if a nearby companion star dumps enough material onto a white dwarf to push it over the Chandrasekhar limit. The resulting collapse and explosion of the white dwarf is believed to be responsible for the so-called Type Ia supernovas. O ...
... limit—it will collapse. In a binary star system this could happen if a nearby companion star dumps enough material onto a white dwarf to push it over the Chandrasekhar limit. The resulting collapse and explosion of the white dwarf is believed to be responsible for the so-called Type Ia supernovas. O ...
Astronomy 1010 final review sample topics
... b.) stars do not move in the sky during a single night, but instead each successive night the stars are slightly displaced relative to where they were the night before c.) stars do not move in the sky during a single night and do not move from one night to the next 3. There are lunar eclipses and th ...
... b.) stars do not move in the sky during a single night, but instead each successive night the stars are slightly displaced relative to where they were the night before c.) stars do not move in the sky during a single night and do not move from one night to the next 3. There are lunar eclipses and th ...
Homework problems for Quiz 2: AY5 Spring 2013
... T White dwarf 3. In the fusion of four protons into helium, 4.7 × 10−26 grams of matter is turned into energy. How much energy does this amount of matter produce? E=∆mc2 = (4.7 × 10−26 ) × (3 × 1010 )2 grams-cm2 /sec2 (erg)= 42.3 × 10−6 ergs 4. How long will a 4M star with L = 5000L spend on the m ...
... T White dwarf 3. In the fusion of four protons into helium, 4.7 × 10−26 grams of matter is turned into energy. How much energy does this amount of matter produce? E=∆mc2 = (4.7 × 10−26 ) × (3 × 1010 )2 grams-cm2 /sec2 (erg)= 42.3 × 10−6 ergs 4. How long will a 4M star with L = 5000L spend on the m ...
HI in Local Group Dwarf Galaxies
... to our detection limits, and these upper limits are lower than the HI mass of any known dwarf which has HI. • Dwarf galaxies at smaller galactocentric distances have less HI on average than those at larger distances. • The HI -distance trend supports data from simulations which suggest ram-pressure ...
... to our detection limits, and these upper limits are lower than the HI mass of any known dwarf which has HI. • Dwarf galaxies at smaller galactocentric distances have less HI on average than those at larger distances. • The HI -distance trend supports data from simulations which suggest ram-pressure ...
1 Do Massive Stars Trigger New Waves of Star Formation
... the Milky Way and allowed astronomers to look into these unique areas of our Galaxy. Spitzer’s landmark mission, the Galactic Legacy Infrared Mid-Plane Survey Extraordinaire (GLIMPSE) in particular, has opened up a new world to astronomers. It has now become possible to pin-point specific objects th ...
... the Milky Way and allowed astronomers to look into these unique areas of our Galaxy. Spitzer’s landmark mission, the Galactic Legacy Infrared Mid-Plane Survey Extraordinaire (GLIMPSE) in particular, has opened up a new world to astronomers. It has now become possible to pin-point specific objects th ...
5Stars_Part_Two
... How do we know all this? By observing Globular clusters… 1. Globular clusters are thousands of stars that all formed at more or less the same time. 2. Globular clusters are much smaller than galaxies. 3. Galaxies create stars in an on-going process. 4. The stars in a globular cluster accrete sudde ...
... How do we know all this? By observing Globular clusters… 1. Globular clusters are thousands of stars that all formed at more or less the same time. 2. Globular clusters are much smaller than galaxies. 3. Galaxies create stars in an on-going process. 4. The stars in a globular cluster accrete sudde ...
Small images
... Usually massive stars make supernovae. Their iron core collapses to a neutron star and the energy released explodes the rest of the star. But what if the explosion fizzled? What if the iron core collapsed to an object too massive to be a neutron star – a black hole. A star without rotation would the ...
... Usually massive stars make supernovae. Their iron core collapses to a neutron star and the energy released explodes the rest of the star. But what if the explosion fizzled? What if the iron core collapsed to an object too massive to be a neutron star – a black hole. A star without rotation would the ...
AnwerkeyTypes-of-stars-and-HR-diagram
... 2. How does surface temperature of White dwarf compares to red giants? __________________Higher______ 3. What is color of stars with highest Surface Temperature? ____________blue____________ 4. What is color of stars with lowest Surface Temperature? _______________Red_________ 5. List the colors fro ...
... 2. How does surface temperature of White dwarf compares to red giants? __________________Higher______ 3. What is color of stars with highest Surface Temperature? ____________blue____________ 4. What is color of stars with lowest Surface Temperature? _______________Red_________ 5. List the colors fro ...
Star formation
Star formation is the process by which dense regions within molecular clouds in interstellar space, sometimes referred to as ""stellar nurseries"" or ""star-forming regions"", collapse to form stars. As a branch of astronomy, star formation includes the study of the interstellar medium (ISM) and giant molecular clouds (GMC) as precursors to the star formation process, and the study of protostars and young stellar objects as its immediate products. It is closely related to planet formation, another branch of astronomy. Star formation theory, as well as accounting for the formation of a single star, must also account for the statistics of binary stars and the initial mass function.In June 2015, astronomers reported evidence for Population III stars in the Cosmos Redshift 7 galaxy at z = 6.60. Such stars are likely to have existed in the very early universe (i.e., at high redshift), and may have started the production of chemical elements heavier than hydrogen that are needed for the later formation of planets and life as we know it.