PPT-Life on Earth – Brought to you by Comets

Emma Galligan 10121 Motivation Personal 2 HST ESA Rosetta NAVCAM E Kolmhofer Scientific Lawrence Livermore Nation Lab N R f p n e f l f i f c  L. &. Eyes on ISON. Hubble Science Briefing. Dr. Frank Summers. November 7, 2013. Comet of the Century?. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. Great Comets. Caesar's Comet – 44 BC. Halley's Comet – 1066. Roxanne Ryan. Overview. Comets. Dynamics of tail. Composition. Oort. Cloud. Kuiper Belt. Model of a Comet. 1950 . -Fred . Whipple proposed a model which . explained . most physical characteristics.. June 26, 1730 - April 12, 1817. Frank Andrade. George Martinez. Born in... -Bandonviller, France June 26, 1730. ​-​Died in Paris, France April 12, ​1817​. Known For.... Known For... Discovering Over 40 Nebula's. Asteroids. Composition (what are they made of?. Asteroids are rocky worlds.. Asteroids. Where are asteroids found?. Most asteroids orbit the Sun between Mars and Jupiter.. Asteroids. What are their shapes?. 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”. Reactivated in Dec 2013, NEOWISE is observing, discovering, and characterizing asteroids & comets . at 3.4 . and 4.6 . m. m. ~11,000 . minor planets observed, including . 245 . near-Earth objects (NEOs). . 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 _____________. __________. . 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.. 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. Facts. Comets, like asteroids are small celestial bodies that orbit the sun. However, unlike asteroids comets are made mostly of frozen ammonia, methane or water, and contain only small amounts of rocky material.. On the third and final full week of March 2016 (the dates of 20. th. . – 26. th. ) there are two comets on a perihelion approach to the Earth on the nights of 21 – 23 March 2016! The comets are 252P/LINEAR and P/2016 BA 14. This a short report on these comets in a rare two – comet flyby that happens once in every 150 years. . 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.. 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.