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Our Solar SystemReviewing from yesterday
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What is a Planet?
definition for a planet is now officially known as a celestial body that (as of 2006)
(a) is in orbit around the Sun (b) has enough mass for its self-gravity to
overcome rigid body forces so that it assumes a nearly round shape
(c) has cleared the neighborhood around its orbit
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Dwarf Planet
is a celestial body that
(a) is in orbit around the Sun(b) has sufficient mass for its self-gravity to
overcome rigid body forces so that it assumes a nearly round shape
(c) has not cleared the neighborhood around its orbit
(d) is not a satellite.
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Plutoid
• Same as a dwarf planet but… must orbit farther away than Neptune
• Named after Pluto– 2005 demoted to a dwarf planet– 2008 renamed as a plutoid– Because its orbit crosses that of Neptune’s
Pluto's story... in a nutshell!
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Exoplanets
• Same as a planet but is outside of our solar system
• Extrasolar
• Orbits around another star (like our Sun)
Taken by Hubble Space Telescope
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Space Technology
• Hubble Space Telescope
–Launched in April 1990
• Spitzer Space Telescope
–Launched summer 2003
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Space Tech Cont’…
• CoRot French Telescope
– Launched December 2006
• Kepler Space Telescope/Mission
– March 2009
NASA-Exoplanet Timeline
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True or False
• All Planets orbit around the Sun
• Planets do not need to have self-gravity
• Dwarf planets are outside of our solar system
• Scientists have not discovered any exoplanets
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School
City
State
Continent
Planet
Solar System
GalaxyUniverse
Put these in order from SMALLEST to BIGGEST
Country
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So far…• School
• City
• State
• Country
• Continent
• Planet
• ?
• ?
• ?
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EA
RT
H
Remember this from
the Apollo Mission
(An Inconvenient Truth)
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Solar System
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Milky Way Galaxy
Our Sun
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The Universe
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From smallest to biggest!!!
• School- ATA
• City- Dearborn
• State- Michigan
• Country- USA
• Continent- North America
• Planet- Earth
• Solar System
• Galaxy- Milky Way
• Universe
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New discovery!
• April 2010
• Newest exoplanet to be discovered!
• Cool as Jupiter- Science News Article
• This Exoplanet is So Cool