In the solar system`s new history the future is a bit dicey, and
... Neptune had advanced toward the Kuiper belt like a gravitational snowplow, piling up dwarf planets into new orbits. “Once the Plutinos were discovered, it was a slam dunk,” she says. “Planet migration practically became a textbook idea.” The notion of migrating planets came along at a time when plan ...
... Neptune had advanced toward the Kuiper belt like a gravitational snowplow, piling up dwarf planets into new orbits. “Once the Plutinos were discovered, it was a slam dunk,” she says. “Planet migration practically became a textbook idea.” The notion of migrating planets came along at a time when plan ...
PC2491 Examples 2
... An H1 cloud in the galactic plane at l=30o is observed to have a velocity relative to the local standard of rest of +80 km s-1. Assume the galactic rotation curve is flat with an amplitude of 220 km s-1 , and that Ro = 8.2 kpc and estimate the two possible distances to this cloud. (4) Estimate the m ...
... An H1 cloud in the galactic plane at l=30o is observed to have a velocity relative to the local standard of rest of +80 km s-1. Assume the galactic rotation curve is flat with an amplitude of 220 km s-1 , and that Ro = 8.2 kpc and estimate the two possible distances to this cloud. (4) Estimate the m ...
PPT
... But scientist s yea rs ago saw something d iff erent abou t tho se rock s and conc luded that an anc ient catastrophic even t had o ccur red, alt hough wha t it was remained a mystery. Now they be li eve they know : A 650- to 700-foot-wide meteorit e crashed to Earth at speeds as h igh as 67,500 mil ...
... But scientist s yea rs ago saw something d iff erent abou t tho se rock s and conc luded that an anc ient catastrophic even t had o ccur red, alt hough wha t it was remained a mystery. Now they be li eve they know : A 650- to 700-foot-wide meteorit e crashed to Earth at speeds as h igh as 67,500 mil ...
PTYS/ASTR 206
... • Life expectancy of about 12,000 years • Long-Period Comets – Comets with orbital periods greater than 200 years (though typically around millions of years) ...
... • Life expectancy of about 12,000 years • Long-Period Comets – Comets with orbital periods greater than 200 years (though typically around millions of years) ...
Jupiter – friend or foe? III: the Oort cloud comets
... that, even in a 100 Myr simulation, very few close encounters with the Earth would be expected even were the Earth greatly inflated. Therefore, in order to directly acquire the rate of impacts on the Earth, we would have had to simulate a vast number of test particles, many orders of magnitude highe ...
... that, even in a 100 Myr simulation, very few close encounters with the Earth would be expected even were the Earth greatly inflated. Therefore, in order to directly acquire the rate of impacts on the Earth, we would have had to simulate a vast number of test particles, many orders of magnitude highe ...
4.2 The planets and their satellites
... moons of similar sizes that lack any comparable atmosphere. Miranda, a satellite of Uranus, appears as if it had been ripped apart and later reassembled. And Triton, a satellite of Neptune, has geysers of nitrogen powered by solar radiation. Magnetic field data suggest that icy moons orbiting the gi ...
... moons of similar sizes that lack any comparable atmosphere. Miranda, a satellite of Uranus, appears as if it had been ripped apart and later reassembled. And Triton, a satellite of Neptune, has geysers of nitrogen powered by solar radiation. Magnetic field data suggest that icy moons orbiting the gi ...
Comets & Meteors (10)
... Which is more distant, the solar system’s “deep freezer” of comet bodies or Alpha Centauri located a mere 4.3 light years distant? ...
... Which is more distant, the solar system’s “deep freezer” of comet bodies or Alpha Centauri located a mere 4.3 light years distant? ...
Formation of our solar system
... gravitational attraction leads to the formation of planetesimals. ...
... gravitational attraction leads to the formation of planetesimals. ...
The Milky Way
... that the bright band on the night sky known as the Milky Way might consist of distant stars. Aristotle (384–322 BC), however, believed the Milky Way to be caused by "the ignition of the fiery exhalation of some stars which were large, numerous and close together" and that the "ignition takes place i ...
... that the bright band on the night sky known as the Milky Way might consist of distant stars. Aristotle (384–322 BC), however, believed the Milky Way to be caused by "the ignition of the fiery exhalation of some stars which were large, numerous and close together" and that the "ignition takes place i ...
Solar System/Planet Formation
... • Sun and planets rotate in same direction • disks seen around other stars • terrestrial planets and asteroids found near Sun • jovian planets, icy moons, comets found farther away ...
... • Sun and planets rotate in same direction • disks seen around other stars • terrestrial planets and asteroids found near Sun • jovian planets, icy moons, comets found farther away ...
Jupiter - Friend or Foe
... that, even in a 100 Myr simulation, very few close encounters with the Earth would be expected even were the Earth greatly inflated. Therefore, in order to directly acquire the rate of impacts on the Earth, we would have had to simulate a vast number of test particles, many orders of magnitude highe ...
... that, even in a 100 Myr simulation, very few close encounters with the Earth would be expected even were the Earth greatly inflated. Therefore, in order to directly acquire the rate of impacts on the Earth, we would have had to simulate a vast number of test particles, many orders of magnitude highe ...
The Milky Way - Drage Homepage
... that the bright band on the night sky known as the Milky Way might consist of distant stars. Aristotle (384–322 BC), however, believed the Milky Way to be caused by "the ignition of the fiery exhalation of some stars which were large, numerous and close together" and that the "ignition takes place i ...
... that the bright band on the night sky known as the Milky Way might consist of distant stars. Aristotle (384–322 BC), however, believed the Milky Way to be caused by "the ignition of the fiery exhalation of some stars which were large, numerous and close together" and that the "ignition takes place i ...
Comets and asteroids
... Asteroids - rocky or metallic objects orbiting the Sun; smaller than a planet and show no evidence of an atmosphere or of other types of activity. Mostly found in the broad space between Mars and Jupiter Too small to be seen without a telescope First of them discovered at the beginning of 19 t ...
... Asteroids - rocky or metallic objects orbiting the Sun; smaller than a planet and show no evidence of an atmosphere or of other types of activity. Mostly found in the broad space between Mars and Jupiter Too small to be seen without a telescope First of them discovered at the beginning of 19 t ...
Astronomy 1 – Winter 2011
... •In general small bodies in the solar system are less likely than large bodies to possess a planet-wide magnetic field. Why should we expect size and magnetism to be correlated? •A) A small body cools more rapidly and is less likely to possess a molten liquid interior. •B) Small bodies are more like ...
... •In general small bodies in the solar system are less likely than large bodies to possess a planet-wide magnetic field. Why should we expect size and magnetism to be correlated? •A) A small body cools more rapidly and is less likely to possess a molten liquid interior. •B) Small bodies are more like ...
(Mike Riddle CTI)-84_eng_cr_v4.0
... also for a long time period. A cloud of hydrogen gas must be compressed to a sufficiently small size so that gravity dominates. continued ...
... also for a long time period. A cloud of hydrogen gas must be compressed to a sufficiently small size so that gravity dominates. continued ...
Meteorite
... extending to about 50,000 AU Kuiper belt: On orderly orbits from 30–100 AU in disk of solar system ...
... extending to about 50,000 AU Kuiper belt: On orderly orbits from 30–100 AU in disk of solar system ...
Asteroids and Comets - Wayne State University
... Origin and Evolution of Comets Comets originate from very great distances The aphelia of new comets are typically around 50,000 AU This clustering of aphelia was first noted by Dutch astronomer Jan Oort in 1950 He then proposed an idea for the origin of those comets, which is still accepted by most ...
... Origin and Evolution of Comets Comets originate from very great distances The aphelia of new comets are typically around 50,000 AU This clustering of aphelia was first noted by Dutch astronomer Jan Oort in 1950 He then proposed an idea for the origin of those comets, which is still accepted by most ...
EXPLORE: Where do meteorites come from
... take a look at the actual distances between them. In this activity students will calculate scale models of the solar system, and it’s suggested that they try it out on a sheet of paper, then work it up to the school oval. The vast size of the solar system introduces a new unit of measure – the Astro ...
... take a look at the actual distances between them. In this activity students will calculate scale models of the solar system, and it’s suggested that they try it out on a sheet of paper, then work it up to the school oval. The vast size of the solar system introduces a new unit of measure – the Astro ...
Solutions Assignment #3
... Aldebaran, Antares, and Canopus have luminosity classes other than V, which means that they have left the main sequence and are no longer burning hydrogen in their cores. k. Spica is the most massive of the main-sequence stars listed because it has the hottest spectral type of the main-sequence star ...
... Aldebaran, Antares, and Canopus have luminosity classes other than V, which means that they have left the main sequence and are no longer burning hydrogen in their cores. k. Spica is the most massive of the main-sequence stars listed because it has the hottest spectral type of the main-sequence star ...
9 Intro to the Solar System
... And remember, every atom in your body and everything you see around you, every tree, every cloud, every human, every computer, everything on Earth, even the Earth itself, was once part of that dense cloud ...
... And remember, every atom in your body and everything you see around you, every tree, every cloud, every human, every computer, everything on Earth, even the Earth itself, was once part of that dense cloud ...
Worksheet 1
... N. A region from which some comets come. The region extends from the orbit of Neptune to beyond Pluto O. A region between the orbits of Mars and Jupiter in which most of the Solar System’s asteroids are located P. A rocky planet similar to the Earth in size and structure Q. A vast region in which co ...
... N. A region from which some comets come. The region extends from the orbit of Neptune to beyond Pluto O. A region between the orbits of Mars and Jupiter in which most of the Solar System’s asteroids are located P. A rocky planet similar to the Earth in size and structure Q. A vast region in which co ...
Origin of stars
... also for a long time period. A cloud of hydrogen gas must be compressed to a sufficiently small size so that gravity dominates. continued ...
... also for a long time period. A cloud of hydrogen gas must be compressed to a sufficiently small size so that gravity dominates. continued ...
Chapter 30 Section 3
... and ammonia that travels through space and develops a bright, distinctive tail as it approaches the Sun ...
... and ammonia that travels through space and develops a bright, distinctive tail as it approaches the Sun ...
The Solar System Activities Outline
... The orbit of anything that orbits the Sun has two foci, with the Sun at one and empty space at the other. As a comet comes near the Sun, the Sun’s gravitational pull speeds it up until it is going fastest when closest to the Sun. The comet’s path is bent by the increasing pull of the Sun’s gravity ...
... The orbit of anything that orbits the Sun has two foci, with the Sun at one and empty space at the other. As a comet comes near the Sun, the Sun’s gravitational pull speeds it up until it is going fastest when closest to the Sun. The comet’s path is bent by the increasing pull of the Sun’s gravity ...
DATE - cloudfront.net
... California Content Standard(s) Covered 5. The solar system consists of planets and other bodies that orbit the Sun in predictable paths. As a basis for understanding this concept: a. Students know the Sun, an average star, is the central and largest body in the solar system and is composed primaril ...
... California Content Standard(s) Covered 5. The solar system consists of planets and other bodies that orbit the Sun in predictable paths. As a basis for understanding this concept: a. Students know the Sun, an average star, is the central and largest body in the solar system and is composed primaril ...
Oort cloud
The Oort cloud (/ˈɔrt/ or /ˈʊərt/) or Öpik–Oort cloud, named after Dutch astronomer Jan Oort and Estonian astronomer Ernst Öpik, is a theoretical spherical cloud of predominantly icy planetesimals believed to surround the Sun at a distance of up to around 100,000 AU (2 ly). This places it at almost half of the distance to Proxima Centauri, the nearest star to the Sun, and in interstellar space. The Kuiper belt and the scattered disc, the other two reservoirs of trans-Neptunian objects, are less than one thousandth as far from the Sun as the Oort cloud. The outer limit of the Oort cloud defines the cosmographical boundary of the Solar System and the region of the Sun's gravitational dominance.The Oort cloud is thought to comprise two regions: a spherical outer Oort cloud and a disc-shaped inner Oort cloud, or Hills cloud. Objects in the Oort cloud are largely composed of ices, such as water, ammonia, and methane.Astronomers conjecture that the matter composing the Oort cloud formed closer to the Sun and was scattered far into space by the gravitational effects of the giant planets early in the Solar System's evolution. Although no confirmed direct observations of the Oort cloud have been made, it may be the source of all long-period and Halley-type comets entering the inner Solar System, and many of the centaurs and Jupiter-family comets as well. The outer Oort cloud is only loosely bound to the Solar System, and thus is easily affected by the gravitational pull both of passing stars and of the Milky Way itself. These forces occasionally dislodge comets from their orbits within the cloud and send them towards the inner Solar System. Based on their orbits, most of the short-period comets may come from the scattered disc, but some may still have originated from the Oort cloud.