r*=13.6 km MPA1 EOS
... Comptonized emission from the one visible hot spot and makes use of the Oblate Schwarzschild approximation for ray-tracing. We include a scattered light contribution, which accounts for flux scattered off an equatorial accretion disk to the observer including time delays in the scattered light. We g ...
... Comptonized emission from the one visible hot spot and makes use of the Oblate Schwarzschild approximation for ray-tracing. We include a scattered light contribution, which accounts for flux scattered off an equatorial accretion disk to the observer including time delays in the scattered light. We g ...
PHYS_3380_082615_bw - The University of Texas at Dallas
... - many of the myths associated with the constellations thought to have been invented to help the farmers remember them - made up stories about them ...
... - many of the myths associated with the constellations thought to have been invented to help the farmers remember them - made up stories about them ...
We Are Made of Stardust
... For stars, there is a price to be paid for creativity: The more kinds of atoms created, the shorter-lived the star. Only the chemically laconic are long-lived. The reason pertains to gravity and how gravity determines the extent and pace of nuclear fusion. The more mass (more hydrogen) that a star b ...
... For stars, there is a price to be paid for creativity: The more kinds of atoms created, the shorter-lived the star. Only the chemically laconic are long-lived. The reason pertains to gravity and how gravity determines the extent and pace of nuclear fusion. The more mass (more hydrogen) that a star b ...
galctr
... M. Reid: Is Sgr A* a SMBH at the dynamic center of the Milky Way? Is Sgr A* at the center of the stellar cluster? -- yes, within 10 mas (orbit of S-2 has pericenter only 15 mas from Sgr A*) Is Sgr A* tied to the stellar cluster? -- yes; comparing proper motions from IR, radio; velocity with 70 ...
... M. Reid: Is Sgr A* a SMBH at the dynamic center of the Milky Way? Is Sgr A* at the center of the stellar cluster? -- yes, within 10 mas (orbit of S-2 has pericenter only 15 mas from Sgr A*) Is Sgr A* tied to the stellar cluster? -- yes; comparing proper motions from IR, radio; velocity with 70 ...
Stellar Magnitudes & Distances
... • Take the difference in magnitudes between two stars. • Raise 2.512 to that power. • Example: How many times brighter is Polaris (a 2nd magnitude star) than a barely-visible 6th magnitude star? • 6 - 2 = 4. So 2.5124 = 39.8 times. Polaris is almost 40 times brighter than the faintest visible star! ...
... • Take the difference in magnitudes between two stars. • Raise 2.512 to that power. • Example: How many times brighter is Polaris (a 2nd magnitude star) than a barely-visible 6th magnitude star? • 6 - 2 = 4. So 2.5124 = 39.8 times. Polaris is almost 40 times brighter than the faintest visible star! ...
The Relationship Between a Star`s Brightness and its Distance
... • Take the difference in magnitudes between two stars. • Raise 2.512 to that power. • Example: How many times brighter is Polaris (a 2nd magnitude star) than a barely-visible 6th magnitude star? • 6 - 2 = 4. So 2.5124 = 39.8 times. Polaris is almost 40 times brighter than the faintest visible star! ...
... • Take the difference in magnitudes between two stars. • Raise 2.512 to that power. • Example: How many times brighter is Polaris (a 2nd magnitude star) than a barely-visible 6th magnitude star? • 6 - 2 = 4. So 2.5124 = 39.8 times. Polaris is almost 40 times brighter than the faintest visible star! ...
Stellar parallax-aberration is geocentric
... about the sun. Here we argue that parallax and aberration are not separate but a single phenomenon that is not due to the earth’s motion, but due to properties of space between a geocentric earth and distant stars. Furthermore, a small, shelled, universe is supported but not required. Copernican (he ...
... about the sun. Here we argue that parallax and aberration are not separate but a single phenomenon that is not due to the earth’s motion, but due to properties of space between a geocentric earth and distant stars. Furthermore, a small, shelled, universe is supported but not required. Copernican (he ...
The Kepler spacecraft has found thousands of likely extrasolar
... ust over 20 years ago, astronomers first detected signs of planets outside our solar system. Initially, they expected to find solar systems like ours, but they quickly realized that isn’t how nature works. In fact, one of the first exoplanets discovered is about Jupiter’s mass but circles its Sun-li ...
... ust over 20 years ago, astronomers first detected signs of planets outside our solar system. Initially, they expected to find solar systems like ours, but they quickly realized that isn’t how nature works. In fact, one of the first exoplanets discovered is about Jupiter’s mass but circles its Sun-li ...
Kepler 186f - Forum Skylive
... could scorch planets nearby. The M dwarf stars also gravitationally interact with their planets, causing tides that heat the planet and often cause their rotations to be ‘tidally locked’, which means one side always faces the star and the other side faces the cold open space, much like our moon is t ...
... could scorch planets nearby. The M dwarf stars also gravitationally interact with their planets, causing tides that heat the planet and often cause their rotations to be ‘tidally locked’, which means one side always faces the star and the other side faces the cold open space, much like our moon is t ...
Chap. 2: Known the Heavens
... • However, the Sun is a poor timekeeper • An apparent solar day varies over the course of the year – The Earth’s orbit is not a perfect circle. The Earth moves faster when it is near the Sun in January, making the day longer – The ecliptic path is tilted with respect to the celestial equator, making ...
... • However, the Sun is a poor timekeeper • An apparent solar day varies over the course of the year – The Earth’s orbit is not a perfect circle. The Earth moves faster when it is near the Sun in January, making the day longer – The ecliptic path is tilted with respect to the celestial equator, making ...
Celestial Sphere
... Declination (like latitude) is measured in degrees north or south of the Celestial equator. Right ascension (like longitude) is measured in units of hours, minutes, and seconds eastward from the position of the vernal equinox on the Celestial equator. The Vernal Equinox is the position of the Sun on ...
... Declination (like latitude) is measured in degrees north or south of the Celestial equator. Right ascension (like longitude) is measured in units of hours, minutes, and seconds eastward from the position of the vernal equinox on the Celestial equator. The Vernal Equinox is the position of the Sun on ...
Planets and Stars Differences and Similarities
... water, but Jupiter is a gas planet so that means it is made all out of gas. So each of our planets look different because of the different atmosphere’s and some of them have no atmosphere at all. From Earth the stars are way farther away than any of the other planets. ...
... water, but Jupiter is a gas planet so that means it is made all out of gas. So each of our planets look different because of the different atmosphere’s and some of them have no atmosphere at all. From Earth the stars are way farther away than any of the other planets. ...
what`s up this month – april 2017
... the middle ages the Virgin was often associated with the Virgin Mary. Spica is the brightest star in the constellation of Virgo and the 16 th brightest star in the night sky. Analysis of its parallax shows that it is located 250 light years from the Sun. It is a spectroscopic binary and rotating ell ...
... the middle ages the Virgin was often associated with the Virgin Mary. Spica is the brightest star in the constellation of Virgo and the 16 th brightest star in the night sky. Analysis of its parallax shows that it is located 250 light years from the Sun. It is a spectroscopic binary and rotating ell ...
Astronomical Distance Ladder
... This proper motion technique is capable of giving reliable distances up to around 800 parsecs. With the distances to many stars in the galaxy calculated by parallax different ways to calculate distance was needed to extend the astronomical distance ladder. It was also discovered that stars radiated ...
... This proper motion technique is capable of giving reliable distances up to around 800 parsecs. With the distances to many stars in the galaxy calculated by parallax different ways to calculate distance was needed to extend the astronomical distance ladder. It was also discovered that stars radiated ...
Review: Quiz 1 Concepts Celestial sphere
... The daily motion of the sun is neither prograde nor retrograde. It is direct." The tropical year is 20 minutes longer than the orbital (sidereal) year." "No two orbits are exactly in the same plane, that's why conjunctions don't always cause eclipses." "I've decided to figure out what celestial phen ...
... The daily motion of the sun is neither prograde nor retrograde. It is direct." The tropical year is 20 minutes longer than the orbital (sidereal) year." "No two orbits are exactly in the same plane, that's why conjunctions don't always cause eclipses." "I've decided to figure out what celestial phen ...
Lab 5: Searching for Extra-Solar Planets
... finding planets of smaller sizes. With the launch of Kepler in 2009, astronomers hope to begin finding Earth-like planets, a quest that will continue with several more satellite telescopes within the next ten years. ...
... finding planets of smaller sizes. With the launch of Kepler in 2009, astronomers hope to begin finding Earth-like planets, a quest that will continue with several more satellite telescopes within the next ten years. ...
Space - SSHS Science 9
... • Groups of stars that seem to form shapes and patterns are called constellations. • Some stars look as though they are close together when some are really much farther from Earth than others. • Constellations have been used for thousands of years as calendars, timekeepers and direction finders for ...
... • Groups of stars that seem to form shapes and patterns are called constellations. • Some stars look as though they are close together when some are really much farther from Earth than others. • Constellations have been used for thousands of years as calendars, timekeepers and direction finders for ...
Galaxies and the Universe
... Standard Candles • You can get the distance to something if you know how much light we receive at Earth (the flux), and how much light it actually gives off (the luminosity). • Standard candles are objects where some observed property allows one to infer the luminosity. • Two examples: – Variable s ...
... Standard Candles • You can get the distance to something if you know how much light we receive at Earth (the flux), and how much light it actually gives off (the luminosity). • Standard candles are objects where some observed property allows one to infer the luminosity. • Two examples: – Variable s ...
Ursa Minor
Ursa Minor (Latin: ""Smaller She-Bear"", contrasting with Ursa Major), also known as the Little Bear, is a constellation in the northern sky. Like the Great Bear, the tail of the Little Bear may also be seen as the handle of a ladle, hence the name Little Dipper. It was one of the 48 constellations listed by the 2nd-century astronomer Ptolemy, and remains one of the 88 modern constellations. Ursa Minor has traditionally been important for navigation, particularly by mariners, due to Polaris being the North Star.Polaris, the brightest star in the constellation, is a yellow-white supergiant and the brightest Cepheid variable star in the night sky, ranging from apparent magnitude 1.97 to 2.00. Beta Ursae Minoris, also known as Kochab, is an aging star that has swollen and cooled to become an orange giant with an apparent magnitude of 2.08, only slightly fainter than Polaris. Kochab and magnitude 3 Gamma Ursae Minoris have been called the ""guardians of the pole star"". Planets have been detected orbiting four of the stars, including Kochab. The constellation also contains an isolated neutron star—Calvera—and H1504+65, the hottest white dwarf yet discovered with a surface temperature of 200,000 K.