The Moon
... brightness is the result of the planet blocking some of the starlight when it is between Ogle-Tr-3 and Earth. This observation allowed scientists to find not only the planet, but also to determine the planet’s mass and density The mass has been calculated to be approximately 159 times the mass of Ea ...
... brightness is the result of the planet blocking some of the starlight when it is between Ogle-Tr-3 and Earth. This observation allowed scientists to find not only the planet, but also to determine the planet’s mass and density The mass has been calculated to be approximately 159 times the mass of Ea ...
19_Testbank - Lick Observatory
... Answer: During a star's lifetime, it fuses hydrogen into helium and helium into carbon. If it is more massive, it also creates heavier elements, up to iron, by fusion, and even heavier elements, up to uranium, during a supernova event. When the star ends its life as a planetary nebula or in a supern ...
... Answer: During a star's lifetime, it fuses hydrogen into helium and helium into carbon. If it is more massive, it also creates heavier elements, up to iron, by fusion, and even heavier elements, up to uranium, during a supernova event. When the star ends its life as a planetary nebula or in a supern ...
Life - Anatomy Atlases
... Life in our Solar System • Extremophiles and where does life exist on Earth - subsurface, deep oceans, oceans, land, atmosphere • Tour of habitable planets + moons of our solar system searching for life - Mars, Europa, Titan, Enceladus • Planetary protection ...
... Life in our Solar System • Extremophiles and where does life exist on Earth - subsurface, deep oceans, oceans, land, atmosphere • Tour of habitable planets + moons of our solar system searching for life - Mars, Europa, Titan, Enceladus • Planetary protection ...
looking up! - Discover the universe
... during a 30-day cycle. It is also possible to observe lunar eclipses during the night, but these are rare. • Planets: Five planets are visible to the naked eye: Mercury, Venus, Mars, Jupiter and Saturn. Without an instrument such as a telescope, they simply look like stars. Some, like Venus, Mars a ...
... during a 30-day cycle. It is also possible to observe lunar eclipses during the night, but these are rare. • Planets: Five planets are visible to the naked eye: Mercury, Venus, Mars, Jupiter and Saturn. Without an instrument such as a telescope, they simply look like stars. Some, like Venus, Mars a ...
File - xaviantvision
... We have uncovered wonders undreamt by our ancestors who first speculated on the nature of those wandering lights in the night sky. We have probed the origins of our planet and ourselves. By discovering what else is possible, by coming face to face with alternative fates of worlds more or less like o ...
... We have uncovered wonders undreamt by our ancestors who first speculated on the nature of those wandering lights in the night sky. We have probed the origins of our planet and ourselves. By discovering what else is possible, by coming face to face with alternative fates of worlds more or less like o ...
The Origin of Comets - Wesley Grove Chapel
... what is found on Earth. This further supports the conclusion that most impactor mass came from Earth. If large impactors came from Earth recently, most moonquakes should be on the near side, and they should still be ...
... what is found on Earth. This further supports the conclusion that most impactor mass came from Earth. If large impactors came from Earth recently, most moonquakes should be on the near side, and they should still be ...
as a PDF file
... “star” on the following nights and within three nights was sure that it moved. At first Piazzi thought he had discovered a new comet. He measured its position relative to the background stars as often as possible until early February 1801, when he fell seriously ill. ...
... “star” on the following nights and within three nights was sure that it moved. At first Piazzi thought he had discovered a new comet. He measured its position relative to the background stars as often as possible until early February 1801, when he fell seriously ill. ...
The High Eccentricity of the Planet Around 16 Cyg B
... of the tertiary exerted on the two inner bodies is different from the attraction exerted on a body at the center of mass of the inner binary system. The difference, sometimes referred to as the tidal force of the third star, can induce long-term slow modulation of the inner binary eccentricity. We w ...
... of the tertiary exerted on the two inner bodies is different from the attraction exerted on a body at the center of mass of the inner binary system. The difference, sometimes referred to as the tidal force of the third star, can induce long-term slow modulation of the inner binary eccentricity. We w ...
MEarth
... collapse or to steep temperature gradients and climatic conditions not suitable for life. Works reviewed in Scalo et al. and Tarter et al. argue that atmospheric heat circulation should prevent each of these barriers to habitability. Regardless, the absence of such heat redistribution would be readi ...
... collapse or to steep temperature gradients and climatic conditions not suitable for life. Works reviewed in Scalo et al. and Tarter et al. argue that atmospheric heat circulation should prevent each of these barriers to habitability. Regardless, the absence of such heat redistribution would be readi ...
Constraints on Long-Period Planets from an L
... is adaptive optics (AO), which allows 6-10m ground-based telescopes to obtain diffraction limited IR images several times sharper than those from HST, despite Earth’s turbulent atmosphere. Theoretical models of giant planets indicate that such telescopes should be capable of detecting self-luminous ...
... is adaptive optics (AO), which allows 6-10m ground-based telescopes to obtain diffraction limited IR images several times sharper than those from HST, despite Earth’s turbulent atmosphere. Theoretical models of giant planets indicate that such telescopes should be capable of detecting self-luminous ...
Chapter 17--Star Stuff
... The length of time from the formation of a protostar to the birth of a main-sequence star depends on the star’s mass. Massive stars do everything faster. The contraction of a high-mass protostar into a main-sequence star may take only a million years or less. A star like our Sun takes about 50 milli ...
... The length of time from the formation of a protostar to the birth of a main-sequence star depends on the star’s mass. Massive stars do everything faster. The contraction of a high-mass protostar into a main-sequence star may take only a million years or less. A star like our Sun takes about 50 milli ...
starry night companion
... “Az” stands for azimuth, an Arabic word (as is altitude) for the position along the horizon; “bearing” is an alternative navigational term. Azimuth is measured in degrees from north, which has an azimuth of 0°, through east (which has an azimuth or a bearing of 90°), through south (180°) and west (2 ...
... “Az” stands for azimuth, an Arabic word (as is altitude) for the position along the horizon; “bearing” is an alternative navigational term. Azimuth is measured in degrees from north, which has an azimuth of 0°, through east (which has an azimuth or a bearing of 90°), through south (180°) and west (2 ...
Abiotic formation of O $\ mathsf {_2} $ and O $\ mathsf {_3} $ in high
... This is roughly consistent with the predictions of climate models (Kasting 1990). It is difficult for us to improve significantly on this assumption, as our own climate model (Pavlov et al. 2000) is not particularly accurate up in the Doppler-broadened stratosphere and mesosphere. The assumed solar UV ...
... This is roughly consistent with the predictions of climate models (Kasting 1990). It is difficult for us to improve significantly on this assumption, as our own climate model (Pavlov et al. 2000) is not particularly accurate up in the Doppler-broadened stratosphere and mesosphere. The assumed solar UV ...
The Dynamical History of Chariklo and its Rings
... the likelihood that Chariklo’s rings could have survived since its capture to the Centaur population. Our results reveal that Chariklo’s orbit occupies a region of stable chaos, resulting in its orbit being marginally more stable than those of the other Centaurs. Despite this, we find that it was mo ...
... the likelihood that Chariklo’s rings could have survived since its capture to the Centaur population. Our results reveal that Chariklo’s orbit occupies a region of stable chaos, resulting in its orbit being marginally more stable than those of the other Centaurs. Despite this, we find that it was mo ...
9 The Clearing of Protoplanetary Disks and of the Protosolar Nebula
... reveal that many young disks have grains 10 times larger than those observed in the interstellar medium, and a non-negligible (from a few to several percentage in mass fractions) contribution from crystalline grains (see Chapters 7 and 8). These observations demonstrate that substantial grain proces ...
... reveal that many young disks have grains 10 times larger than those observed in the interstellar medium, and a non-negligible (from a few to several percentage in mass fractions) contribution from crystalline grains (see Chapters 7 and 8). These observations demonstrate that substantial grain proces ...
Measuring distances to the edge of the local group
... Two main formation models have been proposed. Wetherill (1980) proposed that planetesimals formed primarily from the agglomeration of dust within the solar nebula. Herndon (2004) showed that this model did not produce sufficiently massive planetary cores, so he proposed a model in which the cores of ...
... Two main formation models have been proposed. Wetherill (1980) proposed that planetesimals formed primarily from the agglomeration of dust within the solar nebula. Herndon (2004) showed that this model did not produce sufficiently massive planetary cores, so he proposed a model in which the cores of ...
What are Jupiter and its moons like? - Harvard
... When Galileo peered through his telescope in 1610 and discovered the four largest moons of Jupiter, he could not have imagined what amazing worlds these moons would turn out to be. At the time, he described the moons as appearing like "stars" that moved back and forth around the planet Jupiter. His ...
... When Galileo peered through his telescope in 1610 and discovered the four largest moons of Jupiter, he could not have imagined what amazing worlds these moons would turn out to be. At the time, he described the moons as appearing like "stars" that moved back and forth around the planet Jupiter. His ...
M sin i
... Planets orbit around the center of mass of the Solar system. This is located close to the center of the Sun because it is by far the most massive body. But the Sun also orbits around this barycenter. – Note that Jupiter has contains more than double the mass of all the other planets together. Jupite ...
... Planets orbit around the center of mass of the Solar system. This is located close to the center of the Sun because it is by far the most massive body. But the Sun also orbits around this barycenter. – Note that Jupiter has contains more than double the mass of all the other planets together. Jupite ...
The Physics and Chemistry of Nebular Evolution
... processes described may have operated during more than just the stages that they are ascribed to below. Here we follow Cameron (1995) in defining four main stages of evolution: Stage 1: Formation of the nebula. This is the period of large-mass infall from the parent molecular cloud from which the so ...
... processes described may have operated during more than just the stages that they are ascribed to below. Here we follow Cameron (1995) in defining four main stages of evolution: Stage 1: Formation of the nebula. This is the period of large-mass infall from the parent molecular cloud from which the so ...
May 2017 Astronomy Calendar by Dave Mitsky
... 6/9 Comet 138P/Shoemaker-Levy is at opposition at 3.698 A.U. 6/9 Neptune Trojan 2013 KY18 is at opposition at 29.186 A.U. 6/9 Johann Gottfied Galle's 205th birthday (1812). 6/9 A double Galilean satellite shadow transit occurs at 6:09 a.m. 6/9 Full Moon (known as the Flower, Rose or Strawberry Moon) ...
... 6/9 Comet 138P/Shoemaker-Levy is at opposition at 3.698 A.U. 6/9 Neptune Trojan 2013 KY18 is at opposition at 29.186 A.U. 6/9 Johann Gottfied Galle's 205th birthday (1812). 6/9 A double Galilean satellite shadow transit occurs at 6:09 a.m. 6/9 Full Moon (known as the Flower, Rose or Strawberry Moon) ...
Accuracy of spectroscopy-based radioactive dating of stars
... obtained by propagating the error in Eq. (5). One may also try to derive an equivalent width for the blended line by subtracting the theoretical equivalent width of the blending components from the total W of the blend. However, in general, this ignores saturation effects, and thus the “corrected” W ...
... obtained by propagating the error in Eq. (5). One may also try to derive an equivalent width for the blended line by subtracting the theoretical equivalent width of the blending components from the total W of the blend. However, in general, this ignores saturation effects, and thus the “corrected” W ...
Evidence for the Tidal Destruction of Hot Jupiters by Subgiant Stars
... therefore expect a main-sequence thin-disk stellar population’s space velocity dispersion to decrease with increasing stellar mass. The same is true even for evolved stars, because a star spends such a small fraction of its life as a subgiant or giant relative to its main-sequence lifetime. In this ...
... therefore expect a main-sequence thin-disk stellar population’s space velocity dispersion to decrease with increasing stellar mass. The same is true even for evolved stars, because a star spends such a small fraction of its life as a subgiant or giant relative to its main-sequence lifetime. In this ...
Formation and evolution of the Solar System
The formation of the Solar System began 4.6 billion years ago with the gravitational collapse of a small part of a giant molecular cloud. Most of the collapsing mass collected in the center, forming the Sun, while the rest flattened into a protoplanetary disk out of which the planets, moons, asteroids, and other small Solar System bodies formed.This widely accepted model, known as the nebular hypothesis, was first developed in the 18th century by Emanuel Swedenborg, Immanuel Kant, and Pierre-Simon Laplace. Its subsequent development has interwoven a variety of scientific disciplines including astronomy, physics, geology, and planetary science. Since the dawn of the space age in the 1950s and the discovery of extrasolar planets in the 1990s, the model has been both challenged and refined to account for new observations.The Solar System has evolved considerably since its initial formation. Many moons have formed from circling discs of gas and dust around their parent planets, while other moons are thought to have formed independently and later been captured by their planets. Still others, such as the Moon, may be the result of giant collisions. Collisions between bodies have occurred continually up to the present day and have been central to the evolution of the Solar System. The positions of the planets often shifted due to gravitational interactions. This planetary migration is now thought to have been responsible for much of the Solar System's early evolution.In roughly 5 billion years, the Sun will cool and expand outward many times its current diameter (becoming a red giant), before casting off its outer layers as a planetary nebula and leaving behind a stellar remnant known as a white dwarf. In the far distant future, the gravity of passing stars will gradually reduce the Sun's retinue of planets. Some planets will be destroyed, others ejected into interstellar space. Ultimately, over the course of tens of billions of years, it is likely that the Sun will be left with none of the original bodies in orbit around it.