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. We will not turn our focus to evidences that fit . well into the framework that the earth is young. Those who hold to the earth being billions of . years old have explanations for some of . these “evidences” . 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”. Chemical conditions of the early Earth. . A model for the first cells. First life. Life changes the planet: oxygenating Earth’s oceans and atmosphere. Eukaryotic cells descended from prokaryotic cells. Information for this PowerPoint obtained from: . NSTA Online Module: Solar System: . Asteroids, Comets, and Meteorites . NASA. ESA. Windows2Universe.org. This is a meteorite that had been broken off of Mars from a large impact meteorite. It spent millions of years in space before landing in Antarctica.. 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.. foldable. 6.8 Space Science. Label and color your 3 doors. Fold your paper hamburger style. Cut and label THREE doors, so you will make two lines. Try to make them as even as possible.. 1. Comet. 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 _____________. __________. . 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. Genesis 24:1-67. Remember. To be single is a privilege. Maximize your singlehood. Not everybody will marry in this life e.g. Elijah, Elisha, John the Baptist, Paul the Apostle, . e.t.c. .. Marriage is a privilege also ordained by God as the first institution or ordinance. 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.. We will not turn our focus to evidences that fit . well into the framework that the earth is young. Those who hold to the earth being billions of . years old have explanations for some of . these “evidences” . Ellen Howell (Arecibo Observatory) and Amy Lovell (Agnes Scott College). Hyakutake. Comets: where do they come from?. Icy bodies ejected during giant planet formation. Remnants of early solar system. 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..