History of Astronomy
... average distance from the Sun, which is the semimajor axis distance, will take longer to circle the Sun Third law hints at the nature of the force holding the planets in orbit Third law can be used to determine the semimajor axis, a, if the period, P, is known, a measurement that is not difficul ...
... average distance from the Sun, which is the semimajor axis distance, will take longer to circle the Sun Third law hints at the nature of the force holding the planets in orbit Third law can be used to determine the semimajor axis, a, if the period, P, is known, a measurement that is not difficul ...
Episode 14: Planetary paths-2
... For the first time a star had been seen to change in brightness so dramatically, and it went against the earlier held belief that the stars were permanent and unchanging. By the time Tycho died in 1601, he had collected massive records, charts and notebooks crammed with astronomical data that he had ...
... For the first time a star had been seen to change in brightness so dramatically, and it went against the earlier held belief that the stars were permanent and unchanging. By the time Tycho died in 1601, he had collected massive records, charts and notebooks crammed with astronomical data that he had ...
Background Science - Faulkes Telescope Project
... average, one supernova goes off every 50 years or so in our Galaxy. There are two main types of supernovae - Type Ia and II. Type II are the explosions of very massive stars with mass greater than 8 times the mass of the Sun. Type Ia are the explosions of stars similar in mass to the Sun, which have ...
... average, one supernova goes off every 50 years or so in our Galaxy. There are two main types of supernovae - Type Ia and II. Type II are the explosions of very massive stars with mass greater than 8 times the mass of the Sun. Type Ia are the explosions of stars similar in mass to the Sun, which have ...
3 Nightly Motions
... If a star is far enough to the north: It will not rise or set at all! Its path will simply carry it around the North Star in approximately 24 hours, always staying above the horizon. ...
... If a star is far enough to the north: It will not rise or set at all! Its path will simply carry it around the North Star in approximately 24 hours, always staying above the horizon. ...
Lecture 10: Stellar Evolution
... Role of Mass • A star’s mass determines its entire life story because it determines its core temperature • High-mass stars with >8MSun have short lives, eventually becoming hot enough to make iron, and end in supernova explosions • Low-mass stars with <2MSun have long lives, never become hot e ...
... Role of Mass • A star’s mass determines its entire life story because it determines its core temperature • High-mass stars with >8MSun have short lives, eventually becoming hot enough to make iron, and end in supernova explosions • Low-mass stars with <2MSun have long lives, never become hot e ...
AP Physics Multiple Choice Practice – Gravitation 1. Each of five
... 36. A ball thrown upward near the surface of the Earth with a velocity of 50 m/s will come to rest about 5 seconds later. If the ball were thrown up with the same velocity on Planet X, after 5 seconds it would be still moving upwards at nearly 31 m/s. The magnitude of the gravitational field near t ...
... 36. A ball thrown upward near the surface of the Earth with a velocity of 50 m/s will come to rest about 5 seconds later. If the ball were thrown up with the same velocity on Planet X, after 5 seconds it would be still moving upwards at nearly 31 m/s. The magnitude of the gravitational field near t ...
THE GALACTIC GAZETTE The Astronomical Society of Southern New England Next Meeting
... quiet state and then flares up again weeks or months later. SS Cygni's two stars whirl like stellar Tilt-A-Whirls around their center of gravity once every 6.5 hours. Most ...
... quiet state and then flares up again weeks or months later. SS Cygni's two stars whirl like stellar Tilt-A-Whirls around their center of gravity once every 6.5 hours. Most ...
Radio-quiet Isolated Neutron Stars
... • No companion Isolated • X-ray source Accreting NS In priciple, the accretion of the ISM may make INS shine, and their luminosity could be detected in soft X-ray ...
... • No companion Isolated • X-ray source Accreting NS In priciple, the accretion of the ISM may make INS shine, and their luminosity could be detected in soft X-ray ...
Lecture 3a
... • Very strong proponent of the scientific method – use of observations to test theories. • Early work was on motion, and practical elements like hydrostatics • In 1609 was the first one to use a telescope for astronomy => became the most famous scientist/celebrity in Europe • Last 30 years of hi ...
... • Very strong proponent of the scientific method – use of observations to test theories. • Early work was on motion, and practical elements like hydrostatics • In 1609 was the first one to use a telescope for astronomy => became the most famous scientist/celebrity in Europe • Last 30 years of hi ...
Presentation 2
... Little Dipper. The Little Dipper is part of a bigger constellation known as Ursa Minor or Little. The handle of the little dipper is the tail of the “little bear". ...
... Little Dipper. The Little Dipper is part of a bigger constellation known as Ursa Minor or Little. The handle of the little dipper is the tail of the “little bear". ...
A brightening Sun will boil the seas and bake the continents a billion
... then, its surface temperature will have dropped to around 3,500 K, just over half of what it was on the main sequence. The cool surface will mean the star radiates most of its energy at longer wavelengths, in the red part of the spectrum. Still, the Sun will put out 1,000 times more energy than tod ...
... then, its surface temperature will have dropped to around 3,500 K, just over half of what it was on the main sequence. The cool surface will mean the star radiates most of its energy at longer wavelengths, in the red part of the spectrum. Still, the Sun will put out 1,000 times more energy than tod ...
Friday, April 25 - Otterbein University
... • Stars thinned out very fast at right angles to Milky Way • In the plane of the Milky Way the thinning was slower and depended upon the direction in which he looked ...
... • Stars thinned out very fast at right angles to Milky Way • In the plane of the Milky Way the thinning was slower and depended upon the direction in which he looked ...
Chapter 4 The Solar System
... Others are discovered through the periodic dimming of the parent star’s luminosity. ...
... Others are discovered through the periodic dimming of the parent star’s luminosity. ...
Tycho Brahe & Johannes Kepler
... These laws describe the observed planetary motions but do not describe why these motions occur as they do. ...
... These laws describe the observed planetary motions but do not describe why these motions occur as they do. ...
The ISM
... Temperatures 10 – 100 K. In such a cloud: – If a star’s worth of matter should clump together in a denser region than the rest of the ...
... Temperatures 10 – 100 K. In such a cloud: – If a star’s worth of matter should clump together in a denser region than the rest of the ...
Chap. 4: Gravitation and the Waltz of the Planets
... planet to complete one full orbit of the Sun relative to the stars • Sidereal period is deduced from the observed synodic period ...
... planet to complete one full orbit of the Sun relative to the stars • Sidereal period is deduced from the observed synodic period ...
Our Solar System - Mrs. Carter
... In some ways, Jupiter is like a mini-solar system because it is so big and has four large moons and dozens of smaller moons orbiting around it. It also has several thin rings at its equator. Scientists believe that if Jupiter had become larger during its development, it could have become a star ins ...
... In some ways, Jupiter is like a mini-solar system because it is so big and has four large moons and dozens of smaller moons orbiting around it. It also has several thin rings at its equator. Scientists believe that if Jupiter had become larger during its development, it could have become a star ins ...
Glossary - Royal Astronomical Society of Canada
... or by starlight reflected from dust (“reflection” nebulae) or both; “dark” nebulae consist of clouds of gas and dust that are not so illuminated; “planetary” nebulae are shells of gas ejected by stars; spiral nebulae are galaxies ...
... or by starlight reflected from dust (“reflection” nebulae) or both; “dark” nebulae consist of clouds of gas and dust that are not so illuminated; “planetary” nebulae are shells of gas ejected by stars; spiral nebulae are galaxies ...
The Abundances of the Fe Group Elements in Three Early B Stars in
... multiplets. Based upon these fits, C appears depleted relative to H by -0.70 dex and N by ∼ -0.90 dex. The C/N ratio in the sun is 0.61 dex (Asplund et al. 2005) but in NGC 8181-D1 we find C/N∼0.20 dex. The elevated abundance of nitrogen relative to carbon suggests that CNO-processed material from t ...
... multiplets. Based upon these fits, C appears depleted relative to H by -0.70 dex and N by ∼ -0.90 dex. The C/N ratio in the sun is 0.61 dex (Asplund et al. 2005) but in NGC 8181-D1 we find C/N∼0.20 dex. The elevated abundance of nitrogen relative to carbon suggests that CNO-processed material from t ...
Right Ascension
... When the fuel runs out, the balance between gravity pulling material in and gas pressure pushing it out breaks down. The core begins to contract because energy is no longer being produced. As the core contracts, it gets hotter and hotter, as the pressure increases. What happens next depends on the m ...
... When the fuel runs out, the balance between gravity pulling material in and gas pressure pushing it out breaks down. The core begins to contract because energy is no longer being produced. As the core contracts, it gets hotter and hotter, as the pressure increases. What happens next depends on the m ...
Aquarius (constellation)
Aquarius is a constellation of the zodiac, situated between Capricornus and Pisces. Its name is Latin for ""water-carrier"" or ""cup-carrier"", and its symbol is 20px (Unicode ♒), a representation of water.Aquarius is one of the oldest of the recognized constellations along the zodiac (the sun's apparent path). It was one of the 48 constellations listed by the 2nd century AD astronomer Ptolemy, and it remains one of the 88 modern constellations. It is found in a region often called the Sea due to its profusion of constellations with watery associations such as Cetus the whale, Pisces the fish, and Eridanus the river.