What`s Up - April 2016
... Second-brightest among Leo’s stars is Denebola (‘tail of the lion’), well to the east (right, for an observer facing north) of the ‘question mark’. According to Egyptian legend, the sun was in Leo immediately after the Creation, near Denebola. On a more scientific note, Denebola is about 36 light ye ...
... Second-brightest among Leo’s stars is Denebola (‘tail of the lion’), well to the east (right, for an observer facing north) of the ‘question mark’. According to Egyptian legend, the sun was in Leo immediately after the Creation, near Denebola. On a more scientific note, Denebola is about 36 light ye ...
Unit 2-1 Life Cycle of the Sun
... magnitude, and other observable characteristics of two different types of stars as they go through their life cycles. The absolute magnitude is a measure of how bright a star would appear if it was approximately 32 light years away from the Earth. One of the stars you will observe will be a medium s ...
... magnitude, and other observable characteristics of two different types of stars as they go through their life cycles. The absolute magnitude is a measure of how bright a star would appear if it was approximately 32 light years away from the Earth. One of the stars you will observe will be a medium s ...
PS 224, Fall 2014 HW 4
... 4. Homes to Civilization? We do not yet know how many stars have Earth-like planets, nor do we know the likelihood that such planets might harbor advanced civilizations like our own. However, some stars can probably be ruled out as candidates for advanced civilizations. For example, given that it to ...
... 4. Homes to Civilization? We do not yet know how many stars have Earth-like planets, nor do we know the likelihood that such planets might harbor advanced civilizations like our own. However, some stars can probably be ruled out as candidates for advanced civilizations. For example, given that it to ...
ASTRONOMY 130
... It is easier to locate a celestial object if some prominent constellation or asterism can be found and used as a reference point. Ursa Major (the Big Dipper) serves as a good reference point for the north circumpolar constellations. Locate the Big Dipper. Begin with the star at the tip of the handle ...
... It is easier to locate a celestial object if some prominent constellation or asterism can be found and used as a reference point. Ursa Major (the Big Dipper) serves as a good reference point for the north circumpolar constellations. Locate the Big Dipper. Begin with the star at the tip of the handle ...
PH607 – Galaxies
... Since MACHOs would not emit any light of their own, they would be very hard to detect. Candidates. MACHOs could be black holes, neutron stars, brown dwarfs, unassociated planets. White dwarfs and very faint red dwarfs have also been proposed as candidate MACHOs. Conclusion: not a high fraction of th ...
... Since MACHOs would not emit any light of their own, they would be very hard to detect. Candidates. MACHOs could be black holes, neutron stars, brown dwarfs, unassociated planets. White dwarfs and very faint red dwarfs have also been proposed as candidate MACHOs. Conclusion: not a high fraction of th ...
calculated using stefan`s law
... • magnitude – measure of brightness when observed from earth • Faintest star observed in night sky – 6th • Brightest star observed in night sky – 1st 1st magnitude star is100 times brighter than 6th magnitude ...
... • magnitude – measure of brightness when observed from earth • Faintest star observed in night sky – 6th • Brightest star observed in night sky – 1st 1st magnitude star is100 times brighter than 6th magnitude ...
Zairamink_Lifecycle of a Star
... A black hole is an object which has such high gravitational pull that not even light can escape. Hence it is black. But in the black hole case the initial star was so massive that nothing could stop its gravitational collapse. All the matter of the star's core is crushed to an infinitely small point ...
... A black hole is an object which has such high gravitational pull that not even light can escape. Hence it is black. But in the black hole case the initial star was so massive that nothing could stop its gravitational collapse. All the matter of the star's core is crushed to an infinitely small point ...
PDF version (two pages, including the full text)
... Southern Cross and the Pointers (Alpha and Beta Centauri). Alpha Centauri is a triple system, with two sun like stars orbiting each other every 80 years and a dim red dwarf tagging along at a much larger distance. This star was discovered by Robert Innes at the Union Observatory in Johannesburg in 1 ...
... Southern Cross and the Pointers (Alpha and Beta Centauri). Alpha Centauri is a triple system, with two sun like stars orbiting each other every 80 years and a dim red dwarf tagging along at a much larger distance. This star was discovered by Robert Innes at the Union Observatory in Johannesburg in 1 ...
CONSTELLATION DELPHINUS, THE DOLPHIN
... 1) After Zeus, Poseidon, and Hades had overthrown their father Cronus, they divided up the sky, the sea and the underworld between them, with Poseidon inheriting the sea. He built himself a magnificent underwater palace off the island of Euboea. For all its opulence, the palace felt empty without a ...
... 1) After Zeus, Poseidon, and Hades had overthrown their father Cronus, they divided up the sky, the sea and the underworld between them, with Poseidon inheriting the sea. He built himself a magnificent underwater palace off the island of Euboea. For all its opulence, the palace felt empty without a ...
The Milky Way - 清華大學物理系歡迎頁 Welcome to
... Stars form from the interstellar medium and reach stability fusing hydrogen in their cores. This chapter is about the long, stable middle age of stars on the main sequence and their old age as they swell to become giant stars. Here you will answer three ...
... Stars form from the interstellar medium and reach stability fusing hydrogen in their cores. This chapter is about the long, stable middle age of stars on the main sequence and their old age as they swell to become giant stars. Here you will answer three ...
Study Guide for 3RD Astronomy Exam
... Solve problems relating to the relative brightness or luminosity of two stars given their m or M values. Determine the hottest and coolest stars from a list of stars with their spectral types. Interpret the luminosity class of a star by naming the luminosity class and identifying if the star is in t ...
... Solve problems relating to the relative brightness or luminosity of two stars given their m or M values. Determine the hottest and coolest stars from a list of stars with their spectral types. Interpret the luminosity class of a star by naming the luminosity class and identifying if the star is in t ...
_____ 1. Which of the following statements is NOT true about stars
... b. They are explosions that occur at the beginning of a star’s life. c. They can be brighter than an entire galaxy for several days. d. They are explosions in which a star throws its outer layers into space. 13. A star that has collapsed under gravity is called a(n) ____________________. 14. A rapid ...
... b. They are explosions that occur at the beginning of a star’s life. c. They can be brighter than an entire galaxy for several days. d. They are explosions in which a star throws its outer layers into space. 13. A star that has collapsed under gravity is called a(n) ____________________. 14. A rapid ...
Galaxies • Test 3 (New date) – Thurs, 9 April
... • In a cool cloud of hydrogen, the electrons are in level 1. • If there is a nearby O star, there are lots of photons with enough energy to ionize hydrogen. • Proton captures electron in a high energy level. ...
... • In a cool cloud of hydrogen, the electrons are in level 1. • If there is a nearby O star, there are lots of photons with enough energy to ionize hydrogen. • Proton captures electron in a high energy level. ...
astronomy webquest…… explore the universe
... http://outreach.atnf.csiro.au/education/everyone/pulsars/ ...
... http://outreach.atnf.csiro.au/education/everyone/pulsars/ ...
Lecture 10: Stars
... & Your right eye is the Earth in June Watch the apparent motion of your thumb against a distant reference point (repeat at arm’s length) Which “move” more -- closer or farther objects? ...
... & Your right eye is the Earth in June Watch the apparent motion of your thumb against a distant reference point (repeat at arm’s length) Which “move” more -- closer or farther objects? ...
formation2
... • This over dense region is not uniform, but has within it other, smaller regions of high density. • As the over density begins to be drawn together by gravity, it fragments into smaller pockets of gas which go on to form individual stars. • The result is a star cluster. The more massive pockets fro ...
... • This over dense region is not uniform, but has within it other, smaller regions of high density. • As the over density begins to be drawn together by gravity, it fragments into smaller pockets of gas which go on to form individual stars. • The result is a star cluster. The more massive pockets fro ...
Assignment Worksheet
... No late homework will be accepted. This homework assignment consists of the 5 questions below. Each question has equal weight. 1. Two stars are the same size. One star has a temperature of 50,000 K, the other has a temperature of 5000K. Compared to the cooler star, the hotter star must be a) b) c) d ...
... No late homework will be accepted. This homework assignment consists of the 5 questions below. Each question has equal weight. 1. Two stars are the same size. One star has a temperature of 50,000 K, the other has a temperature of 5000K. Compared to the cooler star, the hotter star must be a) b) c) d ...
Death of Stars
... and the CNO cycle both involve fusion of four Hydrogen nuclei to form a He nucleus and conversion of mass to energy The energy appears as K.E of the particles formed, high energy gamma rays and neutrinos The temperature of the star’s core determines which process will dominate The P-P process domina ...
... and the CNO cycle both involve fusion of four Hydrogen nuclei to form a He nucleus and conversion of mass to energy The energy appears as K.E of the particles formed, high energy gamma rays and neutrinos The temperature of the star’s core determines which process will dominate The P-P process domina ...
HR-Diagram
... This time there is so much energy because of the large mass of the outer star that the collapse causes a Super Nova Explosion. NOW…if the CORE of the star has a mass of 3x or less the size of the sun ( but has a much smaller diameter than the sun) it creates a Neutron Star which spins and emits a st ...
... This time there is so much energy because of the large mass of the outer star that the collapse causes a Super Nova Explosion. NOW…if the CORE of the star has a mass of 3x or less the size of the sun ( but has a much smaller diameter than the sun) it creates a Neutron Star which spins and emits a st ...
Constellations, Star Names, and Magnitudes
... No longer refers to the pattern of stars itself. Now refers to a well defined region of the sky that contains the traditional star pattern. Everything inside that region of the sky is now part of the constellation, like a “celestial state”. ...
... No longer refers to the pattern of stars itself. Now refers to a well defined region of the sky that contains the traditional star pattern. Everything inside that region of the sky is now part of the constellation, like a “celestial state”. ...
Events: - Temecula Valley Astronomers
... Now, look back at Jupiter again. To the left or east of Jupiter is the constellation Leo. Leo (The Lion) is our spring constellation that enters the beginning of the ‘Galaxy Constellations’ well into the summer months. The “head”, “shoulders” and “Chest” of Leo forms what looks like a “sickle” or re ...
... Now, look back at Jupiter again. To the left or east of Jupiter is the constellation Leo. Leo (The Lion) is our spring constellation that enters the beginning of the ‘Galaxy Constellations’ well into the summer months. The “head”, “shoulders” and “Chest” of Leo forms what looks like a “sickle” or re ...
ESA-ESO Working Group on the Galaxy
... 500 streams -> 100*/stream -> 5x104 stars, wide-field (2-3 deg2) 100 multiplex, V ~ 17 for a survey of 2000 deg2 (V ~ 15 for 10000 deg2); HR ~ 20,000 ...
... 500 streams -> 100*/stream -> 5x104 stars, wide-field (2-3 deg2) 100 multiplex, V ~ 17 for a survey of 2000 deg2 (V ~ 15 for 10000 deg2); HR ~ 20,000 ...
31-2 - Fremont Peak Observatory
... “Nebula” is a rather generalized term, that like many astronomical terms, was applied based on early observers impressions of an object rather than once an object was understood. Thus, in at least two cases that will be sited, the name was inappropriate. In one case, we still use a description coine ...
... “Nebula” is a rather generalized term, that like many astronomical terms, was applied based on early observers impressions of an object rather than once an object was understood. Thus, in at least two cases that will be sited, the name was inappropriate. In one case, we still use a description coine ...
Stellar Distances and Magnitudes
... • If all stars were at the same distance, it would be easy to compare their properties. ...
... • If all stars were at the same distance, it would be easy to compare their properties. ...
File - Adopt A Constellation
... • In approximately 5 billion years, the sun will begin the helium-burning process, turning into a red giant star. • When it expands, its outer layers will consume Mercury and Venus, and reach Earth. • The changing sun may provide hope to other planets. (Mars) • When stars morph into red giants, the ...
... • In approximately 5 billion years, the sun will begin the helium-burning process, turning into a red giant star. • When it expands, its outer layers will consume Mercury and Venus, and reach Earth. • The changing sun may provide hope to other planets. (Mars) • When stars morph into red giants, the ...
Serpens
Serpens (""the Serpent"", Greek Ὄφις) is a constellation of the northern hemisphere. One of the 48 constellations listed by the 2nd-century astronomer Ptolemy, it remains one of the 88 modern constellations defined by the International Astronomical Union. It is unique among the modern constellations in being split into two non-contiguous parts, Serpens Caput (Serpent's Head) to the west and Serpens Cauda (Serpent's Tail) to the east. Between these two halves lies the constellation of Ophiuchus, the ""Serpent-Bearer"". In figurative representations, the body of the serpent is represented as passing behind Ophiuchus between Mu Serpentis in Serpens Caput and Nu Serpentis in Serpens Cauda.The brightest star in Serpens is the red giant star Alpha Serpentis, or Unukalhai, in Serpens Caput, with an apparent magnitude of 2.63. Also located in Serpens Caput are the naked-eye globular cluster Messier 5 and the naked-eye variables R Serpentis and Tau4 Serpentis. Notable extragalactic objects include Seyfert's Sextet, one of the densest galaxy clusters known; Arp 220, the prototypical ultraluminous infrared galaxy; and Hoag's Object, the most famous of the very rare class of galaxies known as ring galaxies.Part of the Milky Way's galactic plane passes through Serpens Cauda, which is therefore rich in galactic deep-sky objects, such as the Eagle Nebula (IC 4703) and its associated star cluster Messier 16. The nebula measures 70 light-years by 50 light-years and contains the Pillars of Creation, three dust clouds that became famous for the image taken by the Hubble Space Telescope. Other striking objects include the Red Square Nebula, one of the few objects in astronomy to take on a square shape; and Westerhout 40, a massive nearby star-forming region consisting of a molecular cloud and an H II region.