Orion- The Swordsman of the Sky - A Winter Constellation from the
... which require magnification to see them, such as the Horse Head Nebula. You have to imagine, and possibly take your finger to join the dots, but you can virtually see the shoulders of Orion. The left shoulder star (seen from our vantage point) is Betelgeuse. This is a red super giant star, which als ...
... which require magnification to see them, such as the Horse Head Nebula. You have to imagine, and possibly take your finger to join the dots, but you can virtually see the shoulders of Orion. The left shoulder star (seen from our vantage point) is Betelgeuse. This is a red super giant star, which als ...
Neutron Stars
... Clicker Question: Which of the following is true about a binary pulsar system? A: It will last forever. B: They can only be found in star forming regions C: The total mass of the two pulsars must be more than 10 solar masses. D: Each of the pulsars was produced by a massive star that exploded in a ...
... Clicker Question: Which of the following is true about a binary pulsar system? A: It will last forever. B: They can only be found in star forming regions C: The total mass of the two pulsars must be more than 10 solar masses. D: Each of the pulsars was produced by a massive star that exploded in a ...
11.1 Stars - St John Brebeuf
... It is estimated there are more stars in the universe than there are grains of sand on all the beaches on Earth. By peering through the interstellar matter (dust and gases), astronomers can observe the birth of stars. ...
... It is estimated there are more stars in the universe than there are grains of sand on all the beaches on Earth. By peering through the interstellar matter (dust and gases), astronomers can observe the birth of stars. ...
Opposition of Jupiter - Hong Kong Observatory
... Jupiter revolves around the Sun with a period of about 11.86 years. In ancient China, the year was counted according to the position of Jupiter on the celestial sphere, and matched to the 12 Earthly Branches. So Jupiter is also known as the Age Star. Opposition of Jupiter will occur about once ever ...
... Jupiter revolves around the Sun with a period of about 11.86 years. In ancient China, the year was counted according to the position of Jupiter on the celestial sphere, and matched to the 12 Earthly Branches. So Jupiter is also known as the Age Star. Opposition of Jupiter will occur about once ever ...
Cosmic Distance Ladder
... provides information that can be used to determine the distances at the next higher rung. • Calibration ...
... provides information that can be used to determine the distances at the next higher rung. • Calibration ...
The Family of Stars
... more luminous than star A, so star B must be further away. The flux received from both stars is the same, but star B is 100 times more luminous than star A, so star B must be further away. Both stars are equally luminous, but the flux received from star A is 5 times less than from star B, so star A ...
... more luminous than star A, so star B must be further away. The flux received from both stars is the same, but star B is 100 times more luminous than star A, so star B must be further away. Both stars are equally luminous, but the flux received from star A is 5 times less than from star B, so star A ...
Day 2
... Finally, the rate of fusion becomes high enough to establish gravitational equilibrium. At this point, fusion becomes self-sustaining and the star settles into its hydrogen burning, main sequence life. The main sequence phase is the longest phase of a star's life, about 10 billion years for a star w ...
... Finally, the rate of fusion becomes high enough to establish gravitational equilibrium. At this point, fusion becomes self-sustaining and the star settles into its hydrogen burning, main sequence life. The main sequence phase is the longest phase of a star's life, about 10 billion years for a star w ...
AST 207 Test 1 28 September 2011
... team on the day of discovery. CNN demands to know its period. Estimate the period of the object. What assumption did you have to make? Explain. I assume that the orbit is a circle, because I have no other information. Then I use Kepler’s 3rd Law to find c. (3 pts.) Astronomers say they were lucky to ...
... team on the day of discovery. CNN demands to know its period. Estimate the period of the object. What assumption did you have to make? Explain. I assume that the orbit is a circle, because I have no other information. Then I use Kepler’s 3rd Law to find c. (3 pts.) Astronomers say they were lucky to ...
Solutions - Yale Astronomy
... to part b. You don’t want to cause incorrect rounding later on. Also, remember to show as much work as possible, so that if you used an incorrect answer to part a in order to find the answer to part b, you might at least earn some partial credit for showing correct use of Wien’s Law. c) What is the ...
... to part b. You don’t want to cause incorrect rounding later on. Also, remember to show as much work as possible, so that if you used an incorrect answer to part a in order to find the answer to part b, you might at least earn some partial credit for showing correct use of Wien’s Law. c) What is the ...
chapter 17 measuring the stars
... (including the Sun itself) ~The color of any 24, 000 K object glows white o White Dwarf: A dwarf star with sufficiently high surface temperature that it glows white ...
... (including the Sun itself) ~The color of any 24, 000 K object glows white o White Dwarf: A dwarf star with sufficiently high surface temperature that it glows white ...
Candidate`s registration number: Desk number: ………………….. Date
... position of the main sequence and the Sun. Indicate the three giant branches that the Sun will visit after the main sequence. ...
... position of the main sequence and the Sun. Indicate the three giant branches that the Sun will visit after the main sequence. ...
Recap: High Mass Stars
... Neutron Star • Star with a core from 1.4 to 3 times the size of the Sun becomes a neutron. • Electrons and neutrons combine into neutrons. • 10 km (6 mi) in diameter with a mass more than our Sun! • A teaspoon of neutron star would be about 10 million tons • Acts like a huge magnet with magnetic p ...
... Neutron Star • Star with a core from 1.4 to 3 times the size of the Sun becomes a neutron. • Electrons and neutrons combine into neutrons. • 10 km (6 mi) in diameter with a mass more than our Sun! • A teaspoon of neutron star would be about 10 million tons • Acts like a huge magnet with magnetic p ...
Stellar Evolution of Single Stars
... 1)Pre-main sequence evolution: a relatively short (~ 107-8 yrs) phase, but involving many complex processes. An active research area. 2)Main sequence phase: the longest phase of a star’s life ~ 1010 yrs for the Sun. Have M-L-R relations, Russell-Vogt theorem, as previously discussed. 3)Post-main seq ...
... 1)Pre-main sequence evolution: a relatively short (~ 107-8 yrs) phase, but involving many complex processes. An active research area. 2)Main sequence phase: the longest phase of a star’s life ~ 1010 yrs for the Sun. Have M-L-R relations, Russell-Vogt theorem, as previously discussed. 3)Post-main seq ...
Slide 1
... • A star of about 8 solar masses or more can get as far as making iron in its core • Iron nuclei absorb energy when they fuse, and there is no source of heating to keep up the pressure in the core • The outer layers of the star are no longer held up by pressure of the core, and they collapse inwards ...
... • A star of about 8 solar masses or more can get as far as making iron in its core • Iron nuclei absorb energy when they fuse, and there is no source of heating to keep up the pressure in the core • The outer layers of the star are no longer held up by pressure of the core, and they collapse inwards ...
Activity: Stellar Evolution Scavenger Hunt - Chandra X
... Cassiopeia A is the youngest supernova remnant in our Milky Way Galaxy, believed to be the leftovers of a massive star that exploded over 300 years ago. The material ejected during the supernova smashed into the surrounding gas and dust at about 16 million kilometres per hour. This collision superhe ...
... Cassiopeia A is the youngest supernova remnant in our Milky Way Galaxy, believed to be the leftovers of a massive star that exploded over 300 years ago. The material ejected during the supernova smashed into the surrounding gas and dust at about 16 million kilometres per hour. This collision superhe ...
Astronomy of the Northern Sky—
... The brightest emission nebulae just barely makes it into our northern sky zone. The North American nebula is centered at RA 20:59 Dec. +44º 30’ but it has roughly a 3º diameter so at least part of it qualifies for being in the North Circumpolar Border. From dark sites it is a clearly visible glow to ...
... The brightest emission nebulae just barely makes it into our northern sky zone. The North American nebula is centered at RA 20:59 Dec. +44º 30’ but it has roughly a 3º diameter so at least part of it qualifies for being in the North Circumpolar Border. From dark sites it is a clearly visible glow to ...
Unit 1
... • Red Giant stars can fill their Roche lobes • In a binary star system, the Roche lobes of the two stars can touch, and mass can pass between them. ...
... • Red Giant stars can fill their Roche lobes • In a binary star system, the Roche lobes of the two stars can touch, and mass can pass between them. ...
Hinsdale Astro TEST
... 14. Is this a young star or an old star? Image H 15. Give the proper name of this substellar brown dwarf. 16. What type of radiation does this type of object mainly emit? ...
... 14. Is this a young star or an old star? Image H 15. Give the proper name of this substellar brown dwarf. 16. What type of radiation does this type of object mainly emit? ...
Astronomy 120
... 1. Zeilik Study Exercise 16.1 In a short paragraph, describe the primary characteristics of a white dwarf? 2. Zeilik Study Exercise 16.2 In a short paragraph, describe to a friend who has not studied astronomy the chief features of a neutron star. 3. Zeilik Study Exercise 16.5 Assuming no loss of ma ...
... 1. Zeilik Study Exercise 16.1 In a short paragraph, describe the primary characteristics of a white dwarf? 2. Zeilik Study Exercise 16.2 In a short paragraph, describe to a friend who has not studied astronomy the chief features of a neutron star. 3. Zeilik Study Exercise 16.5 Assuming no loss of ma ...
Main Sequence Stars
... of people if we had to acquire all of the data from people living right now (no questions about the past)? • We could fill in a single HW diagram using lots of different people. We should see a similar path. • We can also estimate how long people spend on particular parts of the path by how many peo ...
... of people if we had to acquire all of the data from people living right now (no questions about the past)? • We could fill in a single HW diagram using lots of different people. We should see a similar path. • We can also estimate how long people spend on particular parts of the path by how many peo ...
fall_2000_final
... 34. Absorption lines in stellar spectra provide information on a star’s A. radial motion. B. composition. C. temperature. D. all of the above. E. only answers A and B 35. The peak or maximum wavelength that you are emitting right now lies in which portion of the electromagnetic spectrum? A. radio B. ...
... 34. Absorption lines in stellar spectra provide information on a star’s A. radial motion. B. composition. C. temperature. D. all of the above. E. only answers A and B 35. The peak or maximum wavelength that you are emitting right now lies in which portion of the electromagnetic spectrum? A. radio B. ...
(AU): Average distance from Earth to Sun
... impact craters, presence of water in ice caps, and ??? ...
... impact craters, presence of water in ice caps, and ??? ...
Star of Bethlehem
In Christian tradition, the Star of Bethlehem, also called the Christmas Star, revealed the birth of Jesus to the Biblical Magi, and later led them to Bethlehem. The star appears only in the nativity story of the Gospel of Matthew, where astrologers from the east are inspired by the star to travel to Jerusalem. There they meet King Herod of Judea, and ask where the king of the Jews had been born. Herod, following a verse from the Book of Micah interpreted as a prophecy, directs them to Bethlehem, to the south of Jerusalem. The star leads them to Jesus' home in the town, where they worship him and give him gifts. The wise men are then given a divine warning not to return to Herod so they return home by a different route.Many Christians see the star as a miraculous sign to mark the birth of the Christ (or messiah). Some theologians claimed that the star fulfilled a prophecy, known as the Star Prophecy. Astronomers have made several attempts to link the star to unusual astronomical events, such as a conjunction of Jupiter and Saturn, a comet or a supernova.Many modern scholars do not consider the story to be describing a historical event but a pious fiction created by the author of the Gospel of Matthew.The subject is a favorite at planetarium shows during the Christmas season, although the Biblical account describes Jesus with a broader Greek word, which can mean either ""infant"" or ""child"" (paidon), rather than the more specific word for infant (brephos), possibly implying that some time has passed since the birth. The visit is traditionally celebrated on Epiphany (January 6) in Western Christianity.