Dusty universe
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An overview of the different kinds of dust found in the universe, the life cycle of dust, and the way we observe dust in the universe.
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The Comets, Meteors and Meteorites by Carolyn Grande (I made)
Comets are icy members of the solar system that orbit the sun in elliptical orbits. They likely formed from the original material from which the solar system was created 5 billion years ago, making them some of the oldest objects in the solar system. Comets have three main structures - the icy nucleus, a coma of evaporated gases that surrounds the nucleus, and one or two tails that always point away from the sun due to radiation pressure and solar winds. Comets originate from two regions in the outer solar system - the Kuiper Belt and the distant Oort Cloud. The most famous periodic comet is Halley's Comet, which orbits the sun every 76 years.
12.16.12 final review
Planetesimal ejection describes how leftover debris from the formation of the planets was captured as moons or ended up in the asteroid belt, Kuiper belt, or Oort cloud. Asteroids and meteoroids are small rocky or metallic objects found primarily in the inner solar system, with asteroids larger than 100 meters and meteoroids smaller. They orbit near the plane of the solar system in regions like the asteroid belt. When these objects enter the Earth's atmosphere, they appear as meteors and some survive impact as meteorites. Larger impacts are rarer but can cause global effects like the extinction of dinosaurs.
Science Project Asteroids Meteroids And Meteors
Meteorites are meteoroids that pass through Earth's atmosphere and hit the surface. Meteoroids come from comets or asteroids and produce streaks of light called meteors as they burn up in Earth's atmosphere. Asteroids revolve around the sun in the asteroid belt between Mars and Jupiter, and some asteroids come near Earth's orbit, posing an impact risk. A large asteroid impact 65 million years ago may have caused the extinction of the dinosaurs.
Comets and asteroids
This document provides information about comets and asteroids. It defines a comet as a small solar system body that displays a coma and sometimes tail when close to the sun due to solar radiation. Comet nuclei range from hundreds of meters to tens of kilometers and are made of ice, dust, and small rocks. The document discusses how Edmond Halley correctly hypothesized that the comets of 1456, 1532, 1607 and 1682 were the same object, now known as Halley's Comet, and how it returns every 75-76 years. It also mentions that the impact of a 10km asteroid may have caused the extinction of dinosaurs 65 million years ago based on geological evidence.
Comets, asteroids, and meteors
This document summarizes the key differences between comets, asteroids, and meteors. Comets originate from the Kuiper Belt and Oort Cloud, are composed of ice and frozen gases, and have highly elliptical orbits. Asteroids originate from the Main Asteroid Belt between Mars and Jupiter, are composed of silicates and metals, and have more rounded orbits. Meteoroids enter Earth's atmosphere and become meteors as they burn up, with fragments that survive impact becoming meteorites. Studying the composition of comets, asteroids, and meteorites provides clues about the early solar system and impacts that affected Earth.
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The zodiacal light( also called false dawn when seen before daylight) is a faint gleam of verbose sun scattered by interplanetary dust. Brighter around the Sun, it appears in a particularly dark night sky to extend from the Sun's direction in a roughly triangular shape along the wheel, and appears with lower intensity and visibility along the whole ecliptic as the zodiacal band. The entire sky is illuminated by zodiacal light, which contributes to the natural light of a moonless night sky.
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Comets Hand out (i Made)
Comets are icy members of the solar system that originate from either the Oort cloud or Kuiper belt. They travel in elliptical orbits around the sun and are composed of a nucleus of ice and dust surrounded by a coma of evaporated gases and ions. As comets near the sun, they develop two tails - an ion tail pushed away by solar wind and a dust tail curved by sunlight. Periodic comets like Halley's comet have orbits lasting less than 200 years, while long-period comets may take over 200 years or be non-repeating. Comets undergo changes in appearance as they travel from their icy state far from the sun to developing comas and tails when close to the sun.
Asteroid meteorcomets
The document discusses asteroids, comets, and Pluto. It explains that asteroids formed from leftover material from planet formation and are found mainly in the asteroid belt between Mars and Jupiter due to Jupiter's gravitational influence. Comets formed beyond the frost line and have icy compositions; their tails form when they near the Sun and ice sublimates. Most comets originate from the Kuiper Belt and Oort Cloud. Pluto has properties matching Kuiper Belt objects. An impact likely caused the mass extinction that killed the dinosaurs. While impacts pose a real threat, the likelihood of a major impact within our lifetimes is low. Other planets can affect Earth's impact rates through their gravitational influence on small solar system bodies.
comets and asteroidssssssssssssssssspptx
This document provides information about comets, asteroids, and meteors. It defines each term, describes their characteristics and locations in the solar system. Comets are icy bodies that develop tails as they near the sun, while asteroids are rocky fragments left over from the solar system's formation. Meteoroids enter the earth's atmosphere and become meteors, with larger ones surviving as meteorites. The document also includes a quiz to test comprehension.
Asteroids and comets
This document discusses debris in our solar system and its importance in understanding the origin and evolution of the early solar system. It provides an overview of asteroids, meteorites, comets, and impact craters on Earth. Evidence suggests an asteroid or comet impact was responsible for the extinction of dinosaurs 65 million years ago. The study of solar system debris holds keys to deciphering the history of our solar system.
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Dusty universe
- 1. The Dusty Universe Anna Quider Institute of Astronomy University of Cambridge
- 4. What is dust, anyways?
- 5. Earth Dust
- 6. Earth Dust Skin Cells Spores Ground Rock Dust Mites Fibers
- 7. But what is dust from outer space?
- 8. It’s tiny Single grains are less than 0.000001 cm (or 1μm) in size. 5μm SiO2 molecules
- 9. Many different components Most common are silicone, oxygen, and carbon but depends on the kind of dust in question.
- 11. Dust life cycle
- 12. Dust life cycle
- 13. Dust life cycle
- 14. Dust life cycle
- 15. Dust life cycle
- 16. Dust life cycle
- 17. Dust life cycle
- 18. How we know about dust Collect samples Light’s interaction with dust
- 19. Moon
- 20. Moon Made by billions of years of collisions on lunar surface. Shown: recent Centaur and LCROSS impacts.
- 21. Moon Possibly problematic for instruments.
- 22. Regolith Processing on the Moon Buried Habitat LUNOX / LLH Storage Mirror ISR ISR (InSect Robot) Mirror
- 23. Mars
- 24. Mars
- 25. Mars Dust storms can affect our robots on Mars.
- 26. Mars 15 May 2005 as seen by Spirit rover
- 27. Comets Messengers from edge of solar system
- 28. Comets
- 29. Comets Stardust Mission Ingredients from early solar system: ice, dry ice, olivine, smectite clay, polycyclic aromatic hydrocarbons, spinel, metallic iron, the silicate enstatite, the carbonate dolomite, and the iron sulfide marcasite
- 30. Saturn Newly discovered dust ring around Saturn 10-20 particles per cubic km of space
- 31. Young Stars
- 32. Young Stars
- 33. Dust and Light
- 34. Local galaxies
- 35. Sub-mm galaxies