Download Small Bodies in our Solar System

Survey
yes no Was this document useful for you?
   Thank you for your participation!

* Your assessment is very important for improving the work of artificial intelligence, which forms the content of this project

Document related concepts

Lunar theory wikipedia, lookup

Tropical year wikipedia, lookup

Orrery wikipedia, lookup

Geocentric model wikipedia, lookup

Rare Earth hypothesis wikipedia, lookup

Oort cloud wikipedia, lookup

Astrobiology wikipedia, lookup

Astronomical unit wikipedia, lookup

Extraterrestrial skies wikipedia, lookup

Panspermia wikipedia, lookup

Solar System wikipedia, lookup

Formation and evolution of the Solar System wikipedia, lookup

Dialogue Concerning the Two Chief World Systems wikipedia, lookup

Extraterrestrial life wikipedia, lookup

Astronomical naming conventions wikipedia, lookup

Impact event wikipedia, lookup

Timeline of astronomy wikipedia, lookup

Comparative planetary science wikipedia, lookup

Transcript
Small Bodies
in our Solar System
Comets
A small body of ice,
rock and cosmic dust
 “Dirty Snowball”
 These are samples
(left over) from the
beginning solar
system formation

Comet Tails
Dust Tail: when comet gets
close enough to Sun
 Ion Tail: electrically
charged particles
 Nucleus: center of
comet

Comet Orbits
Ellipse shape orbit
 Tail always points away
from Sun because of
Solar winds

Comet Origin

Comets come from the Oort Cloud and
Kuiper Belt
Asteroids
Small, rocky bodies
that revolve around
the Sun
 Vary in size and
shape
 Asteroid Belt:
Between Mars and
Jupiter

Meteoroids and Meteorites
Meteoroid: Similar to asteroids but
smaller
 If it enters our atmosphere and strikes the
ground it is called a Meteorite, it looks like
a streak or shooting star in the sky

Meteor Showers
Meteor Showers: certain times of year when
Earth passes through dusty debris and
large amount of meteors are in sight
Types of Meteorites
Stony
Metallic
Stony-Iron
Impacts
The surface of our Moon has more impact
craters because the Moon has no
atmosphere to these objects slow down or
“burn them”
 Atmosphere acts as a shield on Earth
 Earth craters not as visible because of
weathering, erosion and tectonic activity
 Large objects strike Earth every few
thousand years

Earth Craters
This is the Barringer Meteor Crater in
Arizona. The diameter is 1.2 kilometers,
and it is 49,000 years old
Lunar Craters
Torino Scale
A system that allows scientists to rate the
hazard level of an object moving toward
Earth