Carleton University, October 10, 2019 Where did all the planets come - - PowerPoint PPT Presentation

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Carleton University, October 10, 2019 Where did all the planets come - - PowerPoint PPT Presentation

Nov 15, 2023 430 likes •1.03k views

Carleton University, October 10, 2019 Where did all the planets come from? ...From the process of gravitational accretion.... Asteroid Itokawa 535 meters Radiant of Shower We see more meteors after midnight than during the early evening.

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Carleton University, October 10, 2019

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Where did all the planets come from? ...From the process of gravitational accretion....

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Asteroid Itokawa

535 meters

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Radiant of Shower

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Earth Dawn Dusk Sunlight

We see more meteors after midnight than during the early evening…. Why?

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Buzzard Coulee Meteorite Saskatchewan November 20, 2008

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50 - 100 tonnes/day

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Hoba Meteorite, Namibia

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Agnighto Meteorite, Greenland

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Jon Larsen “In Search of Stardust”

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Sean Connery Henry Fonda Natalie Wood Karl Malden Martin Landau 1979

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Are we in danger from a major impact? Or even multiple impacts?

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Typical path of comet

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Comet Swift-Tuttle, photographed in 1992

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Comet Shoemaker-Levy 9 : 1994

Eugene Shoemaker David Levy

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Comet Shoemaker-Levy 9 The “String of Pearls”

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30 meters in diameter

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370 meters in diameter

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Diameter (meters) Airburst Energy Airburst Altitude Average Frequency 30 m 530 kt 16 km (53,000 ft) 185 years 50 m 2.9 Mt 8.5 km (28,000 ft) 764 years 70 m 8.5 Mt 3.4 km (11,000 ft) 1,900 years 85 m 15.6 Mt 0.4 km (1,430ft) 3,300 years

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