Comets
... The Philae lander indeed reached the surface. Unfortunately, it bounced and eventually wound up settling in a shaded area next to a vertical wall. This limited the available solar power and thus the time available for direct experiments (the batteries ...
... The Philae lander indeed reached the surface. Unfortunately, it bounced and eventually wound up settling in a shaded area next to a vertical wall. This limited the available solar power and thus the time available for direct experiments (the batteries ...
Goal: To understand what the Kuiper Belt is, and why it is
... • This means by studying them we can see what our solar system was like 4.5 billion years ago. • Why no planets? Well, as you went further out there was less stuff, and it took longer for the stuff that was there to collide, so smaller objects were the result. • Current total mass is about 10% of th ...
... • This means by studying them we can see what our solar system was like 4.5 billion years ago. • Why no planets? Well, as you went further out there was less stuff, and it took longer for the stuff that was there to collide, so smaller objects were the result. • Current total mass is about 10% of th ...
Asteroids, Comets, and Dwarf Planets: Their Nature, Orbits, and
... orbiting in the same direction as the planets • Oort cloud comets were once closer to the Sun, but they were kicked out there by gravitational interactions with jovian planets: spherical distribution, orbits in any direction ...
... orbiting in the same direction as the planets • Oort cloud comets were once closer to the Sun, but they were kicked out there by gravitational interactions with jovian planets: spherical distribution, orbits in any direction ...
File
... well, such as ammonia, carbon dioxide, carbon monoxide and methane. The nucleus might have a small rocky core. ...
... well, such as ammonia, carbon dioxide, carbon monoxide and methane. The nucleus might have a small rocky core. ...
Scale Model Solar System Teacher`s Guide
... farther to include Eris?” Once again, asking the students to think of landmarks corresponding to these distances will help them visualize adding these objects. You can use a map of the area around your school to facilitate this discussion. More on Asteroids: Ceres is the largest object in the astero ...
... farther to include Eris?” Once again, asking the students to think of landmarks corresponding to these distances will help them visualize adding these objects. You can use a map of the area around your school to facilitate this discussion. More on Asteroids: Ceres is the largest object in the astero ...
e - DTM
... The larger value of P for Earth we have calculated compared to those argued by Morbidelli et al. 2000 (P (1-3)10-6) and Levison et al. 2001 (P = 410-7 ) is caused by the fact that in our runs we considered a larger number of Jupiter-crossing objects and the main portion of the probability of col ...
... The larger value of P for Earth we have calculated compared to those argued by Morbidelli et al. 2000 (P (1-3)10-6) and Levison et al. 2001 (P = 410-7 ) is caused by the fact that in our runs we considered a larger number of Jupiter-crossing objects and the main portion of the probability of col ...
Jovian Planet Systems
... • There must be a continuous replacement of tiny particles. – The tiny particles that make up the rings are subject to non-gravitational forces (photon pressure, solar wind) that push them out of orbit. • The most likely source is impacts with jovian moons. – The dust emitted by Phoebe is an example ...
... • There must be a continuous replacement of tiny particles. – The tiny particles that make up the rings are subject to non-gravitational forces (photon pressure, solar wind) that push them out of orbit. • The most likely source is impacts with jovian moons. – The dust emitted by Phoebe is an example ...
Jupiter: friend or foe An answer
... The idea that Jupiter has protected the Earth from excessive bombardment dates back to when the main impact risk to the Earth was thought to arise from the Oort cloud comets. The idea probably originated in the 1960s, when craters were first widely accepted as evidence of ongoing impacts upon the Ea ...
... The idea that Jupiter has protected the Earth from excessive bombardment dates back to when the main impact risk to the Earth was thought to arise from the Oort cloud comets. The idea probably originated in the 1960s, when craters were first widely accepted as evidence of ongoing impacts upon the Ea ...
Jupiter: friend or foe An answer
... more than about 200 years, with the full range of orbital inclinations). The other population of cometary bodies are the short-period comets. Again, the great majority of these objects have nuclei less than 10 km in diameter, but rather than moving on orbits that take thousands of years to complete, ...
... more than about 200 years, with the full range of orbital inclinations). The other population of cometary bodies are the short-period comets. Again, the great majority of these objects have nuclei less than 10 km in diameter, but rather than moving on orbits that take thousands of years to complete, ...
Space and Planetary Environment
... dust grains that are captured by Earth’s gravitational field and enter the atmosphere to be destroyed by air drag. Occasionally, larger meteorites able to reach the surface occur. Most items of space debris in LEO are, however, artificial. The large pieces of space debris are accurately tracked usin ...
... dust grains that are captured by Earth’s gravitational field and enter the atmosphere to be destroyed by air drag. Occasionally, larger meteorites able to reach the surface occur. Most items of space debris in LEO are, however, artificial. The large pieces of space debris are accurately tracked usin ...
Goal: To understand what the Kuiper Belt is, and why it is
... • This means by studying them we can see what our solar system was like 4.5 billion years ago. • Why no planets? Well, as you went further out there was less stuff, and it took longer for the stuff that was there to collide, so smaller objects were the result. • Current total mass is about 10% of th ...
... • This means by studying them we can see what our solar system was like 4.5 billion years ago. • Why no planets? Well, as you went further out there was less stuff, and it took longer for the stuff that was there to collide, so smaller objects were the result. • Current total mass is about 10% of th ...
Chapter 2 Universe and Planetary Geology
... Pluto has been officially demoted from its status as a planet. The International Astronomical Union (IAU), at a meeting in August 2006, voted on their first "official" definition of a planet. Based on this new definition, Pluto is no longer a planet. According to the IAU's definition, our Solar Syst ...
... Pluto has been officially demoted from its status as a planet. The International Astronomical Union (IAU), at a meeting in August 2006, voted on their first "official" definition of a planet. Based on this new definition, Pluto is no longer a planet. According to the IAU's definition, our Solar Syst ...
Sample pages 1 PDF
... of Kuiper Belt Objects or KBOs (Jewitt 2008). In coming decades, we must explore those transitional objects that could be of interest for understanding this additional source of water and organics. An example is comet 29P/Schwassmann-Wachmann 1 that is considered the archetype of comets exhibiting o ...
... of Kuiper Belt Objects or KBOs (Jewitt 2008). In coming decades, we must explore those transitional objects that could be of interest for understanding this additional source of water and organics. An example is comet 29P/Schwassmann-Wachmann 1 that is considered the archetype of comets exhibiting o ...
PowerPoint Presentation - A Tour of the Solar System
... The Sun is basically a huge ball of hydrogen gas held together by the gravity created by its own mass. Under the intense pressure created at the centre of the Sun by gravity, hydrogen nuclei are fused together to produce helium nuclei. Very simply stated, four hydrogen nuclei are fused into one heli ...
... The Sun is basically a huge ball of hydrogen gas held together by the gravity created by its own mass. Under the intense pressure created at the centre of the Sun by gravity, hydrogen nuclei are fused together to produce helium nuclei. Very simply stated, four hydrogen nuclei are fused into one heli ...
9. Asteroids, Comets, and Dwarf Planets
... Pluto and Eris • Pluto’s size was overestimated after its discovery in 1930, and nothing of similar size was discovered for several decades. • Now other large objects have been discovered in Kuiper belt, including Eris. • The International Astronomical Union (IAU) now classifies Pluto and Eris as d ...
... Pluto and Eris • Pluto’s size was overestimated after its discovery in 1930, and nothing of similar size was discovered for several decades. • Now other large objects have been discovered in Kuiper belt, including Eris. • The International Astronomical Union (IAU) now classifies Pluto and Eris as d ...
Solar System - Big Spring ISD
... All attachments associated with this lesson are referenced in the body of the lesson. Due to considerations for grading or student assessment, attachments that are connected with Performance Indicators or serve as answer keys are available in the district site and are not accessible on the ...
... All attachments associated with this lesson are referenced in the body of the lesson. Due to considerations for grading or student assessment, attachments that are connected with Performance Indicators or serve as answer keys are available in the district site and are not accessible on the ...
Rendezvous with a Comet
... begins to vaporizes creating a hydrogen gas envelope around it. This envelope is not visible to the naked eye. The hydrogen in the envelope comes from water molecules breaking up when they absorb the ultraviolet photons from the Sun. The hydrogen atoms also absorb ultraviolet photons and can onl ...
... begins to vaporizes creating a hydrogen gas envelope around it. This envelope is not visible to the naked eye. The hydrogen in the envelope comes from water molecules breaking up when they absorb the ultraviolet photons from the Sun. The hydrogen atoms also absorb ultraviolet photons and can onl ...
Where Is That Satellite?
... people believe that the orbits of the planets are highly elliptical – almost cigar shaped. In fact, the orbits of the planets are very nearly circular. The problem with this misconception about planetary orbits is that it leads many students to erroneously believe that the cause of the earth’s seaso ...
... people believe that the orbits of the planets are highly elliptical – almost cigar shaped. In fact, the orbits of the planets are very nearly circular. The problem with this misconception about planetary orbits is that it leads many students to erroneously believe that the cause of the earth’s seaso ...
Lesson 0: What is progress
... [Sometimes it can be extremely challenging for students to understand the magnitude of the solar system, even with scaled diagrams. In preparation for walking the solar system, I find it helpful for students to calculate the scale for the model we'll be walking so that they understand where the numb ...
... [Sometimes it can be extremely challenging for students to understand the magnitude of the solar system, even with scaled diagrams. In preparation for walking the solar system, I find it helpful for students to calculate the scale for the model we'll be walking so that they understand where the numb ...
Jupiter – friend or foe? II: the Centaurs Accepted for publication in
... showed that in systems containing bodies which grew only to the size of, say, Uranus and Neptune, the impact flux from comets originating in the Oort Cloud1, experienced by any terrestrial planet, would be a factor of a thousand times greater than that seen today in our System, as a direct result of ...
... showed that in systems containing bodies which grew only to the size of, say, Uranus and Neptune, the impact flux from comets originating in the Oort Cloud1, experienced by any terrestrial planet, would be a factor of a thousand times greater than that seen today in our System, as a direct result of ...
Section 4 Orbits and Effects
... over time. This is due to complex effects of the weak gravitational pull of the other planets. Over the course of about 100,000 years, Earth’s orbit ranges from nearly circular to more elliptical. The eccentricity varies from close to 0 to about 0.05. Scientists have found that some objects in the s ...
... over time. This is due to complex effects of the weak gravitational pull of the other planets. Over the course of about 100,000 years, Earth’s orbit ranges from nearly circular to more elliptical. The eccentricity varies from close to 0 to about 0.05. Scientists have found that some objects in the s ...
Jupiter – friend or foe? II: the Centaurs
... work with a known, albeit modified, system, rather than a theoretical construct. For a flux of objects moving inwards from the Edgeworth–Kuiper belt, this does not seem unreasonable – by choosing a population of objects well beyond the ‘Jupiter ’ in our simulations, with initial perihelia between 17 a ...
... work with a known, albeit modified, system, rather than a theoretical construct. For a flux of objects moving inwards from the Edgeworth–Kuiper belt, this does not seem unreasonable – by choosing a population of objects well beyond the ‘Jupiter ’ in our simulations, with initial perihelia between 17 a ...
THE LATE HEAVY BOMBARDMENT IN THE INNER SOLAR SYSTEM
... rare older detrital zircon grains up to almost 4.3 Ga are known. It is likely that the Moon-forming impact led to a large-scale melting of the Earth and the existence of an early magma ocean. Mantle temperatures in the Hadean were probably much higher than today as a result of a higher heat flow (ab ...
... rare older detrital zircon grains up to almost 4.3 Ga are known. It is likely that the Moon-forming impact led to a large-scale melting of the Earth and the existence of an early magma ocean. Mantle temperatures in the Hadean were probably much higher than today as a result of a higher heat flow (ab ...
Near-Earth object
A near-Earth object (NEO) is a small Solar System body whose orbit brings it into proximity with Earth. All NEOs have a closest approach to the Sun (perihelion) of less than 1.3 astronomical unit (AU). They include about thirteen thousand near-Earth asteroids (NEAs), more than one hundred near-Earth comets (NECs), and a number of solar-orbiting spacecraft and meteoroids, large enough to be tracked in space before striking the Earth. It is now widely accepted that collisions in the past have had a significant role in shaping the geological and biological history of the planet. NEOs have become of increased interest since the 1980s because of increased awareness of the potential danger some of the asteroids or comets pose to Earth, and active mitigations are being researched.NEAs have orbits that lie partly between 0.983 and 1.3 AU away from the Sun. When an NEA is detected it is submitted to the IAU's Minor Planet Center for cataloging. Some NEAs ' orbits intersect that of Earth's so they pose a collision danger. The United States, European Union, and other nations are currently scanning for NEOs in an effort called Spaceguard.In the United States, NASA has a congressional mandate to catalogue all NEOs that are at least 1 kilometer wide, as the impact of such an object would be catastrophic. As of June 2015, there have been 872 NEAs larger than 1 km discovered, of which 153 are potentially hazardous. It was estimated in 2006 that 20% of the mandated objects have not yet been found. As a result of NEOWISE in 2011, it is estimated that 93% of the NEAs larger than 1 km have been found and that only about 70 remain to be discovered. Our inventory is much less complete for smaller objects, which still have potential for large scale damage.Potentially hazardous objects (PHOs) are currently defined based on parameters that measure the object's potential to make threatening close approaches to the Earth. Mostly objects with an Earth minimum orbit intersection distance (MOID) of 0.05 AU or less and an absolute magnitude (H) of 22.0 or brighter (a rough indicator of large size) are considered PHOs. Objects that cannot approach closer to the Earth (i.e. MOID) than 0.05 AU (7,500,000 km; 4,600,000 mi), or are smaller than about 150 m (500 ft) in diameter (i.e. H = 22.0 with assumed albedo of 13%), are not considered PHOs. The NASA Near Earth Object Catalog also includes the approach distances of asteroids and comets measured in lunar distances, and this usage has become a common unit of measure used by the news media in discussing these objects.Some NEOs are of high interest because they can be physically explored with lower mission velocity even than the Moon, due to their combination of low velocity with respect to Earth (ΔV) and small gravity, so they may present interesting scientific opportunities both for direct geochemical and astronomical investigation, and as potentially economical sources of extraterrestrial materials for human exploitation. This makes them an attractive target for exploration. As of 2012, three near-Earth objects have been visited by spacecraft: 433 Eros, by NASA's Near Earth Asteroid Rendezvous probe, 25143 Itokawa, by the JAXA Hayabusa mission, and 4179 Toutatis, by CNSA's Chang'e 2 spacecraft.