Lecture 4
... • Sun plus 8 (or 9 with Pluto) planets many of which have moons • plus “debris”: comets, asteroids, meteors, etc • We’ll go over historical understanding of motion (which is “complicated” when viewed from the Earth) and later look at Solar System formation, planetary atmospheres, and planets discove ...
... • Sun plus 8 (or 9 with Pluto) planets many of which have moons • plus “debris”: comets, asteroids, meteors, etc • We’ll go over historical understanding of motion (which is “complicated” when viewed from the Earth) and later look at Solar System formation, planetary atmospheres, and planets discove ...
Solar systems like ours may be rare - Space.com
... research. "Perhaps some other stars already formed planets. It's only a snapshot in time and as you look at other clusters at different ages you can build up a better picture." Other scientists agree there are many unanswered questions about solar systems beyond our own. "As the precision with which ...
... research. "Perhaps some other stars already formed planets. It's only a snapshot in time and as you look at other clusters at different ages you can build up a better picture." Other scientists agree there are many unanswered questions about solar systems beyond our own. "As the precision with which ...
The Planets Testify of the Creator
... Eight Years.Venus, besides having nearly exactly five times the synodic period of Mercury, is also closely tied to the length of the year on earth. The relationship is very simple: there are almost exactly five Venus cycles every eight years. To show the accuracy, note that 8 x 365 days exactly equa ...
... Eight Years.Venus, besides having nearly exactly five times the synodic period of Mercury, is also closely tied to the length of the year on earth. The relationship is very simple: there are almost exactly five Venus cycles every eight years. To show the accuracy, note that 8 x 365 days exactly equa ...
userfiles/602xxh/files/2013%e5%b1%8a%e9%ab%98%e4%b8%89
... most certain about are large—up to 25 times the size of Earth. According to Christophe Lovis, one of the scientists behind the finding, these five planets are similar to Neptune(海王星). “They’re made mainly of rocks and ice，” he said. “They’re probably not suitable for people to live in.” ...
... most certain about are large—up to 25 times the size of Earth. According to Christophe Lovis, one of the scientists behind the finding, these five planets are similar to Neptune(海王星). “They’re made mainly of rocks and ice，” he said. “They’re probably not suitable for people to live in.” ...
New Worlds - Universiteit Leiden
... prize of the Faculty of Science for their discovery. Exoplanets are found in all types and sizes. Some, like the planet around 51 Pegasi, orbit in a circular orbit close to the star, others follow an elliptical orbit at a greater distance from the star. For some stars, astronomers have even managed ...
... prize of the Faculty of Science for their discovery. Exoplanets are found in all types and sizes. Some, like the planet around 51 Pegasi, orbit in a circular orbit close to the star, others follow an elliptical orbit at a greater distance from the star. For some stars, astronomers have even managed ...
Chapter 15 The Formation of Planetary Systems
... •! The solar system is orderly, not random; yet strong evidence for catastrophic collisions. Need formation theory that explains this. •! Condensation theory is the current favorite—large cloud of interstellar gas and dust starts to collapse, the Sun forms at the center, residual gas and dust remain ...
... •! The solar system is orderly, not random; yet strong evidence for catastrophic collisions. Need formation theory that explains this. •! Condensation theory is the current favorite—large cloud of interstellar gas and dust starts to collapse, the Sun forms at the center, residual gas and dust remain ...
Pluto Evidence
... Pluto is not a planet because it has not cleared out its local neighborhood. When a planet has cleared its local neighborhood, there are no other objects flying where it orbits. Any object that passes near the planet either gets pulled into the planet or gets flung away by the planet. Because the pl ...
... Pluto is not a planet because it has not cleared out its local neighborhood. When a planet has cleared its local neighborhood, there are no other objects flying where it orbits. Any object that passes near the planet either gets pulled into the planet or gets flung away by the planet. Because the pl ...
The Association of Dust Disks and Planets Lynne Hillenbrand (Caltech) P.I.
... planets with periods < t can be assessed. Longer baseline observations are needed to sense planets orbiting farther from their host star, with a 10-year baseline required to detect planets at ∼5 AU. From the known occurrence of giant planets, we expect to discover 10–15 planets from among the 100 “S ...
... planets with periods < t can be assessed. Longer baseline observations are needed to sense planets orbiting farther from their host star, with a 10-year baseline required to detect planets at ∼5 AU. From the known occurrence of giant planets, we expect to discover 10–15 planets from among the 100 “S ...
Chapter 15 The Formation of Planetary Systems
... • The solar system is orderly, not random; yet strong evidence for catastrophic collisions. Need formation theory that explains this. • Condensation theory is the current favorite—large cloud of interstellar gas and dust starts to collapse, the Sun forms at the center, residual gas and dust remain i ...
... • The solar system is orderly, not random; yet strong evidence for catastrophic collisions. Need formation theory that explains this. • Condensation theory is the current favorite—large cloud of interstellar gas and dust starts to collapse, the Sun forms at the center, residual gas and dust remain i ...
View Professor Thaler`s presentation slides
... It uses an 85 Megapixel camera to monitor more than 100,000 stars for transiting planets. Launched in 2009, it is in solar (not Earth) orbit. Although its gyroscopes failed in 2013, it remains useful (with reduced capability) for planet finding. Two successors CHEOPS (ESA), and TESS (NASA) will laun ...
... It uses an 85 Megapixel camera to monitor more than 100,000 stars for transiting planets. Launched in 2009, it is in solar (not Earth) orbit. Although its gyroscopes failed in 2013, it remains useful (with reduced capability) for planet finding. Two successors CHEOPS (ESA), and TESS (NASA) will laun ...
By plugging their latest findings into Earth`s climate patterns
... When analyzing a star’s light, scientists look for spectral “fingerprints,” a pattern of colors different for every individual element, to determine that star’s composition. This process, called spectroscopy, is also useful for determining the chemical makeup of exoplanets and their atmospheres when ...
... When analyzing a star’s light, scientists look for spectral “fingerprints,” a pattern of colors different for every individual element, to determine that star’s composition. This process, called spectroscopy, is also useful for determining the chemical makeup of exoplanets and their atmospheres when ...
Chapter10- Other Planetary Systems -pptx
... • Close gravitational encounters between two massive planets can eject one planet while flinging the other into a highly elliptical orbit. • Multiple close encounters with smaller planetesimals can also cause inward migration. • Resonances may also contribute. ...
... • Close gravitational encounters between two massive planets can eject one planet while flinging the other into a highly elliptical orbit. • Multiple close encounters with smaller planetesimals can also cause inward migration. • Resonances may also contribute. ...
ppt
... disk into internal and external remnants. The mass of the interior and exterior disk depends on the age of the disk. The concept that giant planet migration would eliminate all the mass in its swept zone is not supported by the results. The inner part clears completly if the giant moves inside 0.05 ...
... disk into internal and external remnants. The mass of the interior and exterior disk depends on the age of the disk. The concept that giant planet migration would eliminate all the mass in its swept zone is not supported by the results. The inner part clears completly if the giant moves inside 0.05 ...
Significance of the 27 August 2016 Venus Jupiter Conjunction A
... In one or possibly two time zones (GMT -4 and -5) the planets will appear to merge into a single star. The best places to see the conjunction as it appeared to the wise men will be from locations along the same latitude as Jerusalem and Susa (ancient capital of Persia). This will be along the 32nd p ...
... In one or possibly two time zones (GMT -4 and -5) the planets will appear to merge into a single star. The best places to see the conjunction as it appeared to the wise men will be from locations along the same latitude as Jerusalem and Susa (ancient capital of Persia). This will be along the 32nd p ...
Radio Detection of Extrasolar Planets:
... 3.32 MJ in 267 d orbit (a = 0.811 AU) with e = 0.23 (Fisher et al. 2003) ...
... 3.32 MJ in 267 d orbit (a = 0.811 AU) with e = 0.23 (Fisher et al. 2003) ...
The Ceres Connection - MIT Lincoln Laboratory
... Jupiter’s gravitational influence. The estimated total mass of all the minor planets is much less than that of Earth’s Moon. Only two dozen minor planets in the main asteroid belt have diameters greater than 200 kilometers. With a diameter of about 1,000 kilometers, Ceres dwarfs all the other minor ...
... Jupiter’s gravitational influence. The estimated total mass of all the minor planets is much less than that of Earth’s Moon. Only two dozen minor planets in the main asteroid belt have diameters greater than 200 kilometers. With a diameter of about 1,000 kilometers, Ceres dwarfs all the other minor ...
Moro_Martin`s Talk - CIERA
... Quick Tour to Star and Planet Formation Stars form in clouds of dust and gas. Local density increase occurs within these clouds that portion of the cloud contracts in on itself under its own gravitational pull a protostar is formed (no fusion yet). By conservation of angular momentum, what is left ...
... Quick Tour to Star and Planet Formation Stars form in clouds of dust and gas. Local density increase occurs within these clouds that portion of the cloud contracts in on itself under its own gravitational pull a protostar is formed (no fusion yet). By conservation of angular momentum, what is left ...
Document
... Why larger semi-major axes now? Kepler’s third law implies longer period, so requires monitoring for many years to determine ‘wobble’ precisely Amplitude of wobble smaller (at fixed mP ); benefit of improved spectroscopic precision ...
... Why larger semi-major axes now? Kepler’s third law implies longer period, so requires monitoring for many years to determine ‘wobble’ precisely Amplitude of wobble smaller (at fixed mP ); benefit of improved spectroscopic precision ...
The Search for Extrasolar Planets
... 1995, when Mayor & Queloz5 announced the first discovery of an extrasolar planet orbiting the star 51 Pegasi, by using precise radial velocities (Fig. 1) obtained with the ELODIE spectrograph in the Haute-Provence Observatory. The planet has a mass of 0.44 MJ and an orbital period of 4.23 days, whic ...
... 1995, when Mayor & Queloz5 announced the first discovery of an extrasolar planet orbiting the star 51 Pegasi, by using precise radial velocities (Fig. 1) obtained with the ELODIE spectrograph in the Haute-Provence Observatory. The planet has a mass of 0.44 MJ and an orbital period of 4.23 days, whic ...
The gorilla connection
... a different technique, microlensing. Here, a relatively faint star passing in front of a distant bright star acts as a gravitational lens, focusing light from the distant object, magnifying it and causing it to brighten and fade with a characteristic ‘light curve’ over a period of weeks (Fig. 1a). I ...
... a different technique, microlensing. Here, a relatively faint star passing in front of a distant bright star acts as a gravitational lens, focusing light from the distant object, magnifying it and causing it to brighten and fade with a characteristic ‘light curve’ over a period of weeks (Fig. 1a). I ...
Voyage: A Journey Through Our Solar System Grades K
... The Sun is a star. Why does it look so big and bright compared to the other stars? Because it is much closer than the other stars, not because it is bigger—it is only an average sized star. Did the position of Mercury surprise you? Mercury orbits the Sun faster than any other planet (once every 88 d ...
... The Sun is a star. Why does it look so big and bright compared to the other stars? Because it is much closer than the other stars, not because it is bigger—it is only an average sized star. Did the position of Mercury surprise you? Mercury orbits the Sun faster than any other planet (once every 88 d ...
What is a planet? - The Science Queen
... more planets orbiting our Sun such as Uranus in 1781, Neptune in 1846 and Pluto in 1930. Then, in 1991, advances in telescope technology enabled scientists to discover many more objects in a disk-shaped cloud beyond Pluto called the Kuiper Belt. These objects were classified as Kuiper Belt Objects ( ...
... more planets orbiting our Sun such as Uranus in 1781, Neptune in 1846 and Pluto in 1930. Then, in 1991, advances in telescope technology enabled scientists to discover many more objects in a disk-shaped cloud beyond Pluto called the Kuiper Belt. These objects were classified as Kuiper Belt Objects ( ...
Astrobiology: The Search for Extraterrestrial Life
... Astrobiology is defined as the study of the origin, evolution, distribution, and future of life in the universe. This diverse scientific field encompasses the search for habitable environments within our Solar System as well as planets outside our Solar System that could potentially harbor life. A m ...
... Astrobiology is defined as the study of the origin, evolution, distribution, and future of life in the universe. This diverse scientific field encompasses the search for habitable environments within our Solar System as well as planets outside our Solar System that could potentially harbor life. A m ...
Planet
A planet (from Ancient Greek ἀστήρ πλανήτης (astēr planētēs), or πλάνης ἀστήρ (plánēs astēr), meaning ""wandering star"") is an astronomical object orbiting a star, brown dwarf, or stellar remnant that is massive enough to be rounded by its own gravity, is not massive enough to cause thermonuclear fusion, and has cleared its neighbouring region of planetesimals.The term planet is ancient, with ties to history, science, mythology, and religion. Several planets in the Solar System can be seen with the naked eye. These were regarded by many early cultures as divine, or as emissaries of deities. As scientific knowledge advanced, human perception of the planets changed, incorporating a number of disparate objects. In 2006, the International Astronomical Union (IAU) officially adopted a resolution defining planets within the Solar System. This definition is controversial because it excludes many objects of planetary mass based on where or what they orbit. Although eight of the planetary bodies discovered before 1950 remain ""planets"" under the modern definition, some celestial bodies, such as Ceres, Pallas, Juno, Vesta (each an object in the solar asteroid belt), and Pluto (the first trans-Neptunian object discovered), that were once considered planets by the scientific community are no longer viewed as such.The planets were thought by Ptolemy to orbit Earth in deferent and epicycle motions. Although the idea that the planets orbited the Sun had been suggested many times, it was not until the 17th century that this view was supported by evidence from the first telescopic astronomical observations, performed by Galileo Galilei. By careful analysis of the observation data, Johannes Kepler found the planets' orbits were not circular but elliptical. As observational tools improved, astronomers saw that, like Earth, the planets rotated around tilted axes, and some shared such features as ice caps and seasons. Since the dawn of the Space Age, close observation by space probes has found that Earth and the other planets share characteristics such as volcanism, hurricanes, tectonics, and even hydrology.Planets are generally divided into two main types: large low-density giant planets, and smaller rocky terrestrials. Under IAU definitions, there are eight planets in the Solar System. In order of increasing distance from the Sun, they are the four terrestrials, Mercury, Venus, Earth, and Mars, then the four giant planets, Jupiter, Saturn, Uranus, and Neptune. Six of the planets are orbited by one or more natural satellites.More than a thousand planets around other stars (""extrasolar planets"" or ""exoplanets"") have been discovered in the Milky Way: as of 1 October 2015, 1968 known extrasolar planets in 1248 planetary systems (including 490 multiple planetary systems), ranging in size from just above the size of the Moon to gas giants about twice as large as Jupiter. On December 20, 2011, the Kepler Space Telescope team reported the discovery of the first Earth-sized extrasolar planets, Kepler-20e and Kepler-20f, orbiting a Sun-like star, Kepler-20. A 2012 study, analyzing gravitational microlensing data, estimates an average of at least 1.6 bound planets for every star in the Milky Way.Around one in five Sun-like stars is thought to have an Earth-sized planet in its habitable zone.