Lunar eclipse Wed. Oct. 8 http://www.timeanddate.com/eclipse/in/usa/detroit

Coming to a planet near you…. SPACE ROCKS pages 595-599 Coming to a planet near you….

Comet fun! http://www.windows.ucar.edu/tour/link=/comets/comet_model_interactive.html

Comets Made of rock, ices and tars Snowy dirtballs Two tails: 1)made of gases (straight, dim) and 2)rocks (curved, bright) Tails only seen when close to sun Coma- “head” of comet

Comets

Comet Halley Perihelion 2062 Last seen in 1986 Seen every 76 years

Hale-Bopp 1997

Comet Kohoutek. NASA

Comet Siding Springs http://mars.nasa.gov/comets/sidingspring/

The Oort Cloud Forms a spherical shell around solar system Home to long period comets > 200 years

The Kuiper Belt Home to short-period comets < 200years Orbit on the same plane as planets Donut shaped

Stardust mission Landed on a comet Brought sample back to earth!

Stardust Stardust rendezvoused with Comet Wild 2 on January 2, 2004. Stardust uses aerogel to collect and trap comet and solar wind particles.

Stardust Sample Return The sample landed in the Utah desert January 15, 2006. Only sample return mission expect Apollo Found water and carbon

Making a Deep Impact The mission will blow a football-field sized crater ( 7 stories deep) in Comet Tempel 1 on July 4, 2005. This will be our first look at the fresh inside layers of a comet. Found water ice

What Kind of Impact ? 370 kg Copper impactor (816 lbs.). Impact speed – 10.2 km/s Energy released – 18 gigajoules = (4.5 tons of TNT). Impactor must hit an area less than 6 km (3.7 miles) in diameter from about 864,000 km (536,865 miles) away.

Let’s take a look-

Deep Impact mission Impacted a comet Baby step in destroying space rocks

Asteroids Left over planet materials Rock material

Ida From Galileo

Meteoroids Must be IN SPACE Most are small

Meteor A meteoroid burning up in the atmosphere When many are burning= meteor shower

shooting "star"? Leonid

Meteorite Hits earth

Meteorite Three Groups: Stony (chondrite)- rock like Iron- metallic appearance Stony-Iron- both!

Russia meteorite 2/15/13

Meteor crater, AZ

Meteor crater why are craters rare on Earth?

Craters are rare on Earth because…. Atmosphere burns them up They get eroded away

ASU meteorite lab

Smithsonian meteorites

Worden Meteorite Fell in 1997 in Ann Arbor Through a garage 1550 grams

Titicaca Crater Sept. 15, 2007

Titicaca meteorite chondrite

NASA - Asteroid Will Miss In 2019 - End Of World On Hold The announcement that 2019 is a non-starter was made after further observations by NASA's Near-Earth Objects Office. But they said a remote chance remained that the two-kilometre-wide space rock, known as 2002 NT7, could crash into our planet in 2060. Astronomers initially spotted the asteroid on 5 July, through the Linear Observatory's automated sky survey programme in New Mexico, and early calculations showed it was due to hit our planet on 1 February, 2019.

NEO’S Near Earth Objects http://www.spaceweather.com/