space_rocks2.knit

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.title[
.white[Space rocks!]
]

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# **How space rocks were formed in first place?**

# **What types of space rocks are there?**

]

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<img src="bingbang1.jpg" alt="drawing" width="900" height = "450"/>

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# **Origins**

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- Big Bang around 13.8 billion years (Energy, matter, Space, and time)

- Single densest sphere

- How can we know this?

- What was before?

- How space rocks formed? (4.5 billons years) (from heavier)

]

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<img src="bingbang2.jpg" alt="drawing" width="900" height = "400"/>
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# **Classification**

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- Asteroids (biggest)

- Comets (mixture ice and rock)

- Meteoroid (solid stuff coming from space)

- Meteor (meteoroid getting hot and blazing by our atmosphere)

- Meteorites (hits the ground)

]

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<img src="classification.jpg" alt="drawing" width="800" height = "350"/>
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# Group assignment

- Solar system.

- We are going to make 3 groups each one one has to present one of the main space rocks (Asteroid, Comets, and Meteoroids).

- Have to tell us about 3 things:

- What are they made of?
  - Where they come from?
  - Its main classification.
  
You have 15 minutes to search and 2 minutes to present.

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# **Asteroids (star-like)**

They are rocky, metallic or both, orbiting around the sun in between Mars and Jupiter (main belt). Classified as:

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- 75% carbon based (c-type).

- 17% are silicon based (s-type).

- 8% Miscellaneous (iron, nickel, and others - m-type).

- Some have moons.

]

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*Ceres (400 km in radius)

<img src="ceres.jpg" alt="drawing" width="800" height = "300"/>
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# **Comets**

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- Signs for predictions.

- Comets are a balance mixture of ice and rock.

- Solid part called nucleus and gas tail called coma

- Comets have 2 tails: the gas tail and the dust tail.
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*Halley's Comet

<img src="halley.jpg" alt="drawing" width="800" height = "300"/>
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# **Comets**

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Comets are classified by their orbits:

- Short period comets (< 200 years). 
  
  - Orbits as planets.
  - From scatter disk.

- Long-term comets (> 200 years).

- They can appear everywhere.
  - From Oort cloud.
]

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*Orbits

<img src="orbits.jpg" alt="drawing" width="800" height = "400"/>
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background-image: url(kuiper.png)
background-position: 90% 90%
background-size: 50%

## **Where they go?**

- They evaporate becoming in asteroids

## **Can they hit the Earth?**

- Yes (live formed)

*Pluto is in the Kuiper belt object.

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background-image: url(ort.jpg)
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background-size: contain

# **Oort Cloud**

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- Reach as 1 light year.

- No one knows a Oort object.

- These objects probably formed close to the sun.
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background-image: url(meteor.jpg)
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# **What is a shooting star?**

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- Meteors have a huge amount of kinetic energy.

- As they hit our atmosphere they slow down.

- All that energy has to go somewhere.

- That energy is converted in light and heat.

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background-image: url(shower.jpg)
background-position: 90% 50%
background-size: 50%

## **Where meteors come from?**

- From asteroids.

### **What about meteors showers?**

- They come from comet debris.

- Named after the constellation.

- They are easy to see (after midnight).

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# **Bolides or fireball**

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- These are extremely bright meteors.

- Sometime the pressure breaks them raining dozens or hundreds.

- They don't cause fires.

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.pull-right[
<img src="fireball.jpg" alt="drawing" width="900" height = "400"/>

]
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# **Meteors classification**

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3 broad categories:

1. Stony.

1. Iron.

1. Stony iron.

*The majority of them are stony.
]

.pull-right[
<img src="fireball.jpg" alt="drawing" width="900" height = "400"/>

]
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# **Recap**

# **How space rocks were formed in first place?**

# **What types of space rocks are there?**