Searching for RR Lyrae Stars in M15
... RR Lyrae stars are low-mass variable stars, around 10-14 Gyr old, that pulsate radially with short periods. They were first discovered in nearby globular clusters about a 120 years ago. Today, around 1,500 RR Lyrae stars have been found in globular clusters (GCs) and around 6,000 isolated stars are ...
... RR Lyrae stars are low-mass variable stars, around 10-14 Gyr old, that pulsate radially with short periods. They were first discovered in nearby globular clusters about a 120 years ago. Today, around 1,500 RR Lyrae stars have been found in globular clusters (GCs) and around 6,000 isolated stars are ...
ASTRO-114--Lecture 37-
... for either one. So in the 1800s astronomers wanted to name stars all the way down to about 9 th magnitude. Now, that’s about 300,000 stars. That’s a lot of stars. And so you can’t really give them nice names like Rigel. You can’t use Greek letters. And even if you start using numbers, it’s just gonn ...
... for either one. So in the 1800s astronomers wanted to name stars all the way down to about 9 th magnitude. Now, that’s about 300,000 stars. That’s a lot of stars. And so you can’t really give them nice names like Rigel. You can’t use Greek letters. And even if you start using numbers, it’s just gonn ...
A Planetary Overview
... closely together looking out from Earth, as they traveled their orbits around the Sun. This had not happened since the time of Napoleon. Starting in 1972, NASA scientists and engineers planned to take advantage of this situation by sending out two space probes to explore these planets. Voyager 1 was ...
... closely together looking out from Earth, as they traveled their orbits around the Sun. This had not happened since the time of Napoleon. Starting in 1972, NASA scientists and engineers planned to take advantage of this situation by sending out two space probes to explore these planets. Voyager 1 was ...
second grade - Math/Science Nucleus
... address in the Universe. Our Sun is only one small component amongst the other billions of stars in our galaxy, the Milky Way. The Solar System is a group of 9 planets that revolve around the Sun. We see objects in the night sky because they are either generating or reflecting light. While these obj ...
... address in the Universe. Our Sun is only one small component amongst the other billions of stars in our galaxy, the Milky Way. The Solar System is a group of 9 planets that revolve around the Sun. We see objects in the night sky because they are either generating or reflecting light. While these obj ...
arXiv:astro-ph/0508448v1 22 Aug 2005
... However, the above assumes that all supernovae are equal – that is, that the distribution of parameters which produce WR evolution in the secondary1 and the distribution of parameters which produce an asymmetric SN explosion which unbinds the system are completely unrelated. In reality this is unlik ...
... However, the above assumes that all supernovae are equal – that is, that the distribution of parameters which produce WR evolution in the secondary1 and the distribution of parameters which produce an asymmetric SN explosion which unbinds the system are completely unrelated. In reality this is unlik ...
NAS biographical memoir of Martin Schwarzschild
... Nature and nurture conspired to provide an ideal scientific environment for Martin Schwarzschild, but the early years must have been difficult. He was born to a distinguished and assimilated German-Jewish family in 1912—two years before the outbreak of World War I—when his father, Karl Schwarzschild ...
... Nature and nurture conspired to provide an ideal scientific environment for Martin Schwarzschild, but the early years must have been difficult. He was born to a distinguished and assimilated German-Jewish family in 1912—two years before the outbreak of World War I—when his father, Karl Schwarzschild ...
OORT CLOUD EXPLORER - DYNAMIC OCCULTATION
... inner and outer) is crucial if we are to unravel the conditions and processes that lead to the formation of the solar system. The Kuiper belt is that region of the solar system beyond 30 AU and stretching to the inner edge of the Oort cloud. The Kuiper belt can be thought of as a debris disk, contai ...
... inner and outer) is crucial if we are to unravel the conditions and processes that lead to the formation of the solar system. The Kuiper belt is that region of the solar system beyond 30 AU and stretching to the inner edge of the Oort cloud. The Kuiper belt can be thought of as a debris disk, contai ...
Searching for the oldest, most metal-poor stars in the SkyMapper Survey
... the strength of the calcium absorption line. Measuring the difference between the stellar flux in the different filters (e.g. g − r) yields colors for each star. Detailed combination of colors involving the v filter and other colors enables the selection of low-metallicity candidates. The candidate ...
... the strength of the calcium absorption line. Measuring the difference between the stellar flux in the different filters (e.g. g − r) yields colors for each star. Detailed combination of colors involving the v filter and other colors enables the selection of low-metallicity candidates. The candidate ...
Downloadable Full Text
... measurements11,16,17. It is thus extremely likely that the neutron-capture material in Ret II was produced by just one event. If each UFD was equally likely to host an r-process event, then the probability that N r-process events occurred in Ret II but zero r-process events occurred in the other nin ...
... measurements11,16,17. It is thus extremely likely that the neutron-capture material in Ret II was produced by just one event. If each UFD was equally likely to host an r-process event, then the probability that N r-process events occurred in Ret II but zero r-process events occurred in the other nin ...
Workbook IAC
... months. Comets appear to be bright balls with fat tails. They do not fall rapidly in the sky; you would have to watch one for hours or days to see its movement. The center of a comet is a ball of frozen gas, dust, and water. Like planets or moons, comets orbit around the Sun. The comet that causes ...
... months. Comets appear to be bright balls with fat tails. They do not fall rapidly in the sky; you would have to watch one for hours or days to see its movement. The center of a comet is a ball of frozen gas, dust, and water. Like planets or moons, comets orbit around the Sun. The comet that causes ...
Project 8 : Stellar Spectra: Classification
... Absorption lines occur when an electron absorbs energy from the spectrum to move up the energy levels in the atom. Since hydrogen has only one electron, this electron is usually in the ground state. But as the temperature rises, the average electron gains m ...
... Absorption lines occur when an electron absorbs energy from the spectrum to move up the energy levels in the atom. Since hydrogen has only one electron, this electron is usually in the ground state. But as the temperature rises, the average electron gains m ...
10 New Constellations
... Also known as Eta Ursae Majoris, Alkaid is a bluish-white main sequence star with surface temperatures around 3 times that of the sun, it's also around 3 and half times larger in radius than the sun. Mizar-Alcor A six star system around 80 light years from Earth, Mizar consists of two pairs of binar ...
... Also known as Eta Ursae Majoris, Alkaid is a bluish-white main sequence star with surface temperatures around 3 times that of the sun, it's also around 3 and half times larger in radius than the sun. Mizar-Alcor A six star system around 80 light years from Earth, Mizar consists of two pairs of binar ...
Star Formation in the Galaxy, An Observational Overview
... on to their outer atmospheres. Once a star exhausts its supply of hydrogen in its central core, nuclear reactions there plummet and the helium-rich core contracts unable to support itself against gravity. The contraction of the core releases large amounts of gravitational potential energy that cause ...
... on to their outer atmospheres. Once a star exhausts its supply of hydrogen in its central core, nuclear reactions there plummet and the helium-rich core contracts unable to support itself against gravity. The contraction of the core releases large amounts of gravitational potential energy that cause ...
TEKS 8.13 A, B, and C
... Astronomers can “see” much deeper into space and much dimmer objects than with Earth-based telescopes. Stars Stars can be classified by their temperature, color and luminosity. The luminosity of a star is a measure of the total amount of power it gives off into space during nuclear fusion. Other st ...
... Astronomers can “see” much deeper into space and much dimmer objects than with Earth-based telescopes. Stars Stars can be classified by their temperature, color and luminosity. The luminosity of a star is a measure of the total amount of power it gives off into space during nuclear fusion. Other st ...
Astrology
... •One constellation is in the ascendant •The Sun is in one sign •The planets and the Moon are each in a sign •There is an aspect between each pair of planets •Moon may be ascending or descending •Times of transits (when a planet crosses the ascendant/descendant) ...
... •One constellation is in the ascendant •The Sun is in one sign •The planets and the Moon are each in a sign •There is an aspect between each pair of planets •Moon may be ascending or descending •Times of transits (when a planet crosses the ascendant/descendant) ...
Astrology
... • Zodiacal constellations move through houses • Signs/planets are in the ascendant (on horizon and rising), or descendant (on horizon and setting) for 2 hrs/day • Angular displacements of planets are the aspects ...
... • Zodiacal constellations move through houses • Signs/planets are in the ascendant (on horizon and rising), or descendant (on horizon and setting) for 2 hrs/day • Angular displacements of planets are the aspects ...
Discovery of a candidate inner Oort cloud planetoid
... inclinations. Continued perturbations can move the perihelion back into the planetary region where the object becomes a new visible comet with a semimajor axis still ∼ 104 AU. The major inconsistency between this picture of the formation of the Oort cloud and the orbit of our newly discovered object ...
... inclinations. Continued perturbations can move the perihelion back into the planetary region where the object becomes a new visible comet with a semimajor axis still ∼ 104 AU. The major inconsistency between this picture of the formation of the Oort cloud and the orbit of our newly discovered object ...
Telescopes of the Future
... Observatory, all cooled with liquid helium to within a few degrees of absolute zero, have revealed the very cold universe. New discoveries can be expected from the Space Infrared Telescope Facility (SIRTF), a new helium-cooled telescope with 0.85 m aperture and more advanced detectors, which is sche ...
... Observatory, all cooled with liquid helium to within a few degrees of absolute zero, have revealed the very cold universe. New discoveries can be expected from the Space Infrared Telescope Facility (SIRTF), a new helium-cooled telescope with 0.85 m aperture and more advanced detectors, which is sche ...
The Cosmic Perspective Our Galaxy
... Milky Way tells us that most of our galaxy's dark matter lies within the Sun's orbit. a) True, the Sun's motion in the galaxy shows that we are near the edge of the Milky Way disk and therefore exterior to most of the mass of the galaxy. b) True, the Milky Way's rotation curve stops increasing wel ...
... Milky Way tells us that most of our galaxy's dark matter lies within the Sun's orbit. a) True, the Sun's motion in the galaxy shows that we are near the edge of the Milky Way disk and therefore exterior to most of the mass of the galaxy. b) True, the Milky Way's rotation curve stops increasing wel ...