What is an Asteroid?. Asteroid Sizes Where are they? Where do they come from?

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What is an Asteroid?

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Transcript of What is an Asteroid?. Asteroid Sizes Where are they? Where do they come from?

Page 1: What is an Asteroid?. Asteroid Sizes Where are they? Where do they come from?

What is an Asteroid?

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Asteroid Sizes

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Where are they?

Where do they come from?

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How do we study asteroid?

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LINEAR NEO Search Systems

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Asteroids: Years of Discovery

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Hubble!

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EROS Asteroid 433EROS Asteroid 433

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Hayabusa Visiting Asteroid Itokawa

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Hayabusa Visiting Asteroid Itokawa

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Why are we interested in Asteroids?

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What happens if an Asteroid hits the Earth?

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Earth Sterilizing Impact

Mass Extinction Impact

Civilization Threatening Impact

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What Happens When an Impact Takes Place?

What Happens When an Impact Takes Place?

Bolides (up to 5 MT)• Great fireworks display, no damageTunguska-class (15 MT) impact• Damage similar to large nuclear bomb (city-killer)• Average interval for whole Earth: 100 yr.• Minor risk relative to other natural disasters

(earthquakes, etc.)Larger local or regional catastrophes (e.g. 10,000 MT)• Destroys area equivalent to small country • Average interval for whole Earth: 100,000 yr.• Moderate risk relative to other natural disastersGlobal catastrophe (> 1 million MT)• Global environmental damage, threatening civilization• Average interval for whole Earth: 1 million years• Major risk relative to other natural disasters

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Could it Happen?

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Terrestrial Impact Frequency

Terrestrial Impact Frequency

year

century

million yr.

billion yr.

ten thousand yr.

100 millionmillion10,00010010.01

Hiroshima

Tunguska

K/T

TNT equivalent yield (MT)

Global catastrophe

Tsunami danger

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What Can We Do?

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Strategies

• Detect

Project NEO (Near Earth Objects)

http://neo.jpl.nasa.gov/

• Deflect

Gravitational Tractor

Impactor

• Destroy

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LINEAR NEO Search Systems

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Questions??

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Civilization Threatening ImpactCivilization Threatening Impact

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Mass Extinction ImpactMass Extinction Impact

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Earth Sterilizing ImpactEarth Sterilizing Impact

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Known Kilometer-Size Near Earth AsteroidsKnown Kilometer-Size Near Earth Asteroids

1000

500

1990 1995 2000

estimated total NEAs > 1 km

Spaceguard official start

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Looks like a potato?

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EM Alumni Where are they now? Where have they been? What do they say?

EM Alumni Where are they now? Where have they been? What do they say?

Asteroid Redirect Mission (ARM) - NASA · 20142015 20182019 2021. Asteroid Redirect Robotic Mission (ARRM) 20162017 2020. Asteroid rendezvous &capture Asteroid ... (IPS) thruster

Asteroid Redirect Mission (ARM) - NASA · 20142015 20182019 2021. Asteroid Redirect Robotic Mission (ARRM) 20162017 2020. Asteroid rendezvous &capture Asteroid ... (IPS) thruster

Where Are They Now?

Where Are They Now?

Where Were They?

Where Were They?

Who Where They 2

Who Where They 2

Where are they from & Where are they now?

Where are they from & Where are they now?

asteroid - Mr. Ferrantello's Website · 2019. 9. 26. · The Solar System The Solar System the area in space between Mars and Jupiter where most asteroids orbit together asteroid

asteroid - Mr. Ferrantello's Website · 2019. 9. 26. · The Solar System The Solar System the area in space between Mars and Jupiter where most asteroids orbit together asteroid

Waves Where They Come From and Where They Are Going.

Waves Where They Come From and Where They Are Going.

Input Prices: Where Are They Now and Where Are They Going?

Input Prices: Where Are They Now and Where Are They Going?

The Celts: Where did they come from, where did they go?roryvantuyl.com/PDFs/Celts Paper.pdf · 1 The Celts: Where did they come from, where did they go? Rory Van Tuyl, June 10, 2015

The Celts: Where did they come from, where did they go?roryvantuyl.com/PDFs/Celts Paper.pdf · 1 The Celts: Where did they come from, where did they go? Rory Van Tuyl, June 10, 2015

Asteroid Initiative Opportunities Forum Update on Asteroid - NASA

Asteroid Initiative Opportunities Forum Update on Asteroid - NASA

What Does Swami Sivananda Teach? · they have lost it. They are frantically searching for it. But where? Where they are able to see. Not where it is, where they lost it!” Peace

What Does Swami Sivananda Teach? · they have lost it. They are frantically searching for it. But where? Where they are able to see. Not where it is, where they lost it!” Peace

Iran: Spatial Unit Examined Where are they going? Where have they been?

Iran: Spatial Unit Examined Where are they going? Where have they been?

CHINA: “WHERE ARE THEY?

CHINA: “WHERE ARE THEY?

Where are they now

Where are they now

How where they organized?

How where they organized?

Where do they live

Where do they live

Interplanetary bodies: asteroids asteroid-- rocky object in orbit around the sun includes: Main Belt asteroid Hilda and Thule asteroid near-Earth asteroid.

Interplanetary bodies: asteroids asteroid-- rocky object in orbit around the sun includes: Main Belt asteroid Hilda and Thule asteroid near-Earth asteroid.

Hurricanes Typhoons and tropical cyclones. Tropical Storms What are they How they form Where they form Where they go What they do.

Hurricanes Typhoons and tropical cyclones. Tropical Storms What are they How they form Where they form Where they go What they do.

Migration CHAPTER 3. Migration from where to where Geographers study from where people migrate and to where they migrate why They also study why they.

Migration CHAPTER 3. Migration from where to where Geographers study from where people migrate and to where they migrate why They also study why they.