PPT-Comets, Asteroids and Meteors

Chapter 20 A loose collection of ice dust and small rocky particles Orbits are very long and narrow ellipses Comprised of 2 parts Head and Tail Originate from either Kuiper belt or Oort cloud. Unit 4. Appearances of comet Kohoutek (1973), Halley (1986), and Hale-Bopp (1997) caused great concern among superstitious.. Comet Hyakutake in 1996. Throughout history, comets have been considered as portents of doom, even very recently: . Comets. one of the most glorious things to see in the sky is a comet.. May be visible for only days, weeks, or months. Comet. : chunks of ice and dust whose orbits are very long, narrow ellipses.. Think of them as a “dirty snowball”. Buy my . meteoroid . today!. By Mrs. Adams . What is a . meteoroid?. A . meteoroid. is a space rock that is smaller than an asteroid or a comet.. . I . I was just . chillin. ’ in space when I got knocked out of my orbit. I wonder what will. Comets and Their Significance. In the past, people dreaded comets as omens of human disasters such as wars or famines.. Today we know that . comets. are icy members of our solar system that have highly elliptical orbits.. What will we bring back? . Paula Lindgren. School of Geographical and Earth Sciences University of Glasgow. SPACE Glasgow Research. . C. onference. University of Glasgow. 2. 8. th. Oct 2014. Asteroids. Solutions. 1. Describe . the focus of comparative . planetology. and discuss its importance to solar system studies. .. Comparative . planetology. is . the approach we use to study and understand our solar system. I. Comets. A. What is a Comet?: . It is a small body orbiting the Sun that develops a ______ (a fuzzy atmosphere) and/or a ____ as it approaches the Sun. Comet nuclei range from _____________. __________. . Comets. -More than 3000 comets have been discovered. -May take hundreds or even 1000s of years to orbit the sun. -240 BC was the earliest sighting of a comet. Halley's Comet is arguably the most famous comet. It is a "periodic" comet and returns to Earth's vicinity about every 75 years, making it possible for a human to see it twice in his or her lifetime. The last time it was here was in 1986, and it is projected to return in 2061.. Biggest meteor. The biggest meteor to hit earth was in . R. ussia the speed was 1500 kilometres per hour or about 950 miles per hour.. The width was 50 meters. . It injured 1100 people.. Most common meteor. By Trevor Todd and Michael Tran. What are asteroids made. . of?. An asteroid is a rocky object up to kilometers wide that revolves around the Sun.. . What are comets made out of? . A. . comet is a frozen mass. Asteroids. Over 100,000 asteroids.. Vesta is the largest – 330 miles. in diameter.. Size range – 330 miles to about. 100 yards.. Irregular-shaped rocky bodies.. Some asteroids have moon(s).. Comets and asteroids are particularly interesting because of their resemblance to . planetisimals. : the building blocks of the Solar System.. Asteroids are rocky, and most are found between Mars and Jupiter.. Hervé Lamy. Belgian Institute for Space Aeronomy. Brussels, Belgium. Meteor forward scattering. Specular reflection. Retrieval of trajectory. The BRAMS network. BEACON. 49.97 MHz. 150 W. Right-handed circularly polarized. Section 4. Prentice Hall Earth Science. 23.4 Objectives. Identify . location within our solar system where most asteroids are found. Describe . the structure of a comet. Explain . the possible origins for a meteoroid.