June 2015 - Bristol Astronomical Society
... Between the constellation Bootes and the bright star Vega in Lyra lies the constellation Hercules. The Red Giant star Alpha Herculis or Ras Algethi, its arabic name, is one of the largest stars known, with a diameter of around 500 times that of our Sun. In common with most giant stars it varies its ...
... Between the constellation Bootes and the bright star Vega in Lyra lies the constellation Hercules. The Red Giant star Alpha Herculis or Ras Algethi, its arabic name, is one of the largest stars known, with a diameter of around 500 times that of our Sun. In common with most giant stars it varies its ...
The Sun
... – Summer, fall, winter, and spring constellations can be seen only at certain times of the year because of Earth’s changing position in its orbit around the Sun. ...
... – Summer, fall, winter, and spring constellations can be seen only at certain times of the year because of Earth’s changing position in its orbit around the Sun. ...
Earth-Moon-Sun Answer Key
... You are planning a camping trip. You want as much natural light as possible each night. There will be a new moon on February 5 and a full moon on February 19. Assuming every night during February will have no clouds, which 5 days would be best for your camping trip? A. February 6 – 10 B. February 15 ...
... You are planning a camping trip. You want as much natural light as possible each night. There will be a new moon on February 5 and a full moon on February 19. Assuming every night during February will have no clouds, which 5 days would be best for your camping trip? A. February 6 – 10 B. February 15 ...
Great Observatories Origins Deep Survey (GOODS) Observation
... • This course consists of some carefully selected topics in astrophysics. It focuses on practical issues, as well as on current research and open questions, mostly in extragalactic research. These will include: ...
... • This course consists of some carefully selected topics in astrophysics. It focuses on practical issues, as well as on current research and open questions, mostly in extragalactic research. These will include: ...
COMMENTS ON HOMEWORK 1 In many cases the answer to a
... We can consider the relative positions of Earth (E), Jupiter (J), and the Sun (S) by supposing E to be fixed in the above diagram. When J is opposite the E from the S, it is full. As J moves around, E sees a little less than the full phase (gibbous is the technical phrase). The visible face of Jupi ...
... We can consider the relative positions of Earth (E), Jupiter (J), and the Sun (S) by supposing E to be fixed in the above diagram. When J is opposite the E from the S, it is full. As J moves around, E sees a little less than the full phase (gibbous is the technical phrase). The visible face of Jupi ...
MS Word version
... Sidereal Time is used to describe the rotation of Earth and is needed to accurately point telescopes and keep track of the positions of objects in the sky. A sidereal day is the time needed for one complete rotation of Earth and is approximately 23 hours and 56 minutes long. If Earth were rotating i ...
... Sidereal Time is used to describe the rotation of Earth and is needed to accurately point telescopes and keep track of the positions of objects in the sky. A sidereal day is the time needed for one complete rotation of Earth and is approximately 23 hours and 56 minutes long. If Earth were rotating i ...
The Significance of Mega Stars
... letters to the brightest stars visible in each constellation, usually in descending order of apparent brightness (but Bayer was not always consistent in this). In the early 1700s John Flamsteed assigned numbers to the bright stars in each constellation, in order of right ascension. The Flamsteed num ...
... letters to the brightest stars visible in each constellation, usually in descending order of apparent brightness (but Bayer was not always consistent in this). In the early 1700s John Flamsteed assigned numbers to the bright stars in each constellation, in order of right ascension. The Flamsteed num ...
The Sculptor dwarf irregular galaxy SDIG: present and past
... galactic H I (Burstein & Heiles 1984). Given that SDIG is more than 10° away from the Sculptor dwarf spheroidal, a direct measurement is preferable. Thus, the authors adopt the RC3 value, namely E(B - v)gal = 0.00 mag. The internal extinction in SDIG is unknown. Based on model fits to optical surfac ...
... galactic H I (Burstein & Heiles 1984). Given that SDIG is more than 10° away from the Sculptor dwarf spheroidal, a direct measurement is preferable. Thus, the authors adopt the RC3 value, namely E(B - v)gal = 0.00 mag. The internal extinction in SDIG is unknown. Based on model fits to optical surfac ...
steady flow
... With only hydrogen available (for example in a first generation star right after it’s formation) the ppI chain is the only possible sequence of reactions. (all other reaction sequences require the presence of catalyst nuclei) 3- or 4-body reactions are too unlikely – chain has to proceed by steps of ...
... With only hydrogen available (for example in a first generation star right after it’s formation) the ppI chain is the only possible sequence of reactions. (all other reaction sequences require the presence of catalyst nuclei) 3- or 4-body reactions are too unlikely – chain has to proceed by steps of ...
Evolution of a Planetary System
... Investigating Types of Stars What do you think, now? After completing your investigation, please answer these questions: 1. From Earth, stars appear to be different colors: blue, white, yellow, orange, and red. What causes one star to be a different color than another star? ...
... Investigating Types of Stars What do you think, now? After completing your investigation, please answer these questions: 1. From Earth, stars appear to be different colors: blue, white, yellow, orange, and red. What causes one star to be a different color than another star? ...
PH607lec12
... The existence of these relatively young (though evolved) stars there was of a surprise to experts, who would have expected the tidal forces from the central black-hole to prevent their formation. They are much too young to have migrated far, but it seems even more improbable that they formed in the ...
... The existence of these relatively young (though evolved) stars there was of a surprise to experts, who would have expected the tidal forces from the central black-hole to prevent their formation. They are much too young to have migrated far, but it seems even more improbable that they formed in the ...
MS Word version
... Sidereal Time is used to describe the rotation of Earth and is needed to accurately point telescopes and keep track of the positions of objects in the sky. A sidereal day is the time needed for one complete rotation of Earth and is approximately 23 hours and 56 minutes long. If Earth were rotating i ...
... Sidereal Time is used to describe the rotation of Earth and is needed to accurately point telescopes and keep track of the positions of objects in the sky. A sidereal day is the time needed for one complete rotation of Earth and is approximately 23 hours and 56 minutes long. If Earth were rotating i ...
Searching for stars in high-velocity clouds
... distance to M31 we would expect a cluster of stars (tip of red giant branch) around m I = 21–22 with colours of (V − I ) = 1.2–1.8 (box in Fig. 1). None of the colour–magnitude diagrams shows such a feature. We conclude that (i) the compact HVCs contain no stars; or (ii) they are at greater distance ...
... distance to M31 we would expect a cluster of stars (tip of red giant branch) around m I = 21–22 with colours of (V − I ) = 1.2–1.8 (box in Fig. 1). None of the colour–magnitude diagrams shows such a feature. We conclude that (i) the compact HVCs contain no stars; or (ii) they are at greater distance ...
Chapter 18 The Bizarre Stellar Graveyard What is a white dwarf
... • Do black holes really exist? – Some X-ray binaries contain compact objects to massive to be neutron stars—they are almost certainly black holes ...
... • Do black holes really exist? – Some X-ray binaries contain compact objects to massive to be neutron stars—they are almost certainly black holes ...
Systematics of Galaxy Properties and Scaling Relations Ay 127
... (However, its significance has been disputed by Kormendy et al.) ...
... (However, its significance has been disputed by Kormendy et al.) ...
Distances and Sizes - University of Iowa Astrophysics
... for the short side of the big triangle • What is the largest distance we can get between the two telescopes (if both of them have to be on Earth – no spacecraft). ...
... for the short side of the big triangle • What is the largest distance we can get between the two telescopes (if both of them have to be on Earth – no spacecraft). ...
Slide 1
... • Astronomers think that most of the stars in the Milky Way galaxy could also have planets orbiting around them. These are called “extra-solar planets”. ...
... • Astronomers think that most of the stars in the Milky Way galaxy could also have planets orbiting around them. These are called “extra-solar planets”. ...
White Dwarfs and Neutron Stars
... Energy source is spin down of neutron star. Must lie along pulsar beam to see pulsed signals. ...
... Energy source is spin down of neutron star. Must lie along pulsar beam to see pulsed signals. ...
White Dwarfs and Neutron Stars
... Energy source is spin down of neutron star. Must lie along pulsar beam to see pulsed signals. ...
... Energy source is spin down of neutron star. Must lie along pulsar beam to see pulsed signals. ...
Apr 2017 - Astronomical Society of Northern New England
... Saturn now rises about 1 am and will end its normal, eastward motion one day before Jupiter reaches opposition. Saturn will not reach opposition until June 15. April 1. Mercury is near Mars in the evening sky. April 3. First quarter moon is at 2:39 p.m. EDT. April 6. Saturn is stationary in the sky, ...
... Saturn now rises about 1 am and will end its normal, eastward motion one day before Jupiter reaches opposition. Saturn will not reach opposition until June 15. April 1. Mercury is near Mars in the evening sky. April 3. First quarter moon is at 2:39 p.m. EDT. April 6. Saturn is stationary in the sky, ...
THE 3-D UNIVERSE CONCEPTS
... object you are looking at is trillions of miles away, however, having two viewpoints a few inches apart makes no difference. To determine distances greater than about 20 feet, you would need to move your eyes farther apart. Astronomers accomplish this by comparing pictures taken from different point ...
... object you are looking at is trillions of miles away, however, having two viewpoints a few inches apart makes no difference. To determine distances greater than about 20 feet, you would need to move your eyes farther apart. Astronomers accomplish this by comparing pictures taken from different point ...
Astronomy - Career Account Web Pages
... faint magnitude of 29, which is 500 million times fainter that the faintest stars seen by the human eye. The dim object is a compact galaxy of blue stars that existed 480 million years after the Big Bang, only four percent of the universe's current age. It is tiny and considered a building block of ...
... faint magnitude of 29, which is 500 million times fainter that the faintest stars seen by the human eye. The dim object is a compact galaxy of blue stars that existed 480 million years after the Big Bang, only four percent of the universe's current age. It is tiny and considered a building block of ...
Lecture 36: Strange New Worlds
... Many of the planets are on very eccentric (elliptical) orbits, unlike in our Solar System Planetary Migration is a way to explain how gas giants can be so close to their stars and on eccentric orbits. Current techniques are mostly biased against finding systems like our own, but that is starting to ...
... Many of the planets are on very eccentric (elliptical) orbits, unlike in our Solar System Planetary Migration is a way to explain how gas giants can be so close to their stars and on eccentric orbits. Current techniques are mostly biased against finding systems like our own, but that is starting to ...
Corvus (constellation)
Corvus is a small constellation in the Southern Celestial Hemisphere. Its name comes from the Latin word ""raven"" or ""crow"". It includes only 11 stars with brighter than 4.02 magnitudes. One of the 48 constellations listed by the 2nd-century astronomer Ptolemy, it remains one of the 88 modern constellations. The four brightest stars, Gamma, Delta, Epsilon, and Beta Corvi from a distinctive quadrilateral in the night sky. The young star Eta Corvi has been found to have two debris disks.