Deep Impact First look inside a comet Dr. Paul Roche Faulkes Telescope Project Cardiff University.

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Deep Impact First look inside a comet Dr. Paul Roche Faulkes Telescope Project Cardiff University

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Transcript of Deep Impact First look inside a comet Dr. Paul Roche Faulkes Telescope Project Cardiff University.

Page 1: Deep Impact First look inside a comet Dr. Paul Roche Faulkes Telescope Project Cardiff University.

Deep ImpactFirst look inside a comet

Dr. Paul RocheFaulkes Telescope Project

Cardiff University

Page 2: Deep Impact First look inside a comet Dr. Paul Roche Faulkes Telescope Project Cardiff University.

Overview

• Intro to Deep Impact• Comets in history• The modern comet• Why study them?• Deep Impact mission summary

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Comets in history

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Isaac Newton, 1680

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“Dirty snowballs”

Nucleus

Coma

Tails : dust, gas

Water + molecules

The Modern Comet

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Why study comets?

Formation of Solar system Impacts and mass extinctions Life in the universe?

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Solar System History

>4.6 Gydark cloud

Planets accrete

HadeanOceans + rocks form~4.4 Gy ago

Late planetary bombardmentComets bring water + organicsArchean

Oldest life on Earth3.5-3.8 Gy ago

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Death of the Dinosaurs

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Climate & Civilisation

Tree-rings & ice-cores“Extreme climatic downturns”

2345 BC Bronze Age 1628 BC 1159 BC 540 AD Dark Ages

Dragon myths?

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Page 27: Deep Impact First look inside a comet Dr. Paul Roche Faulkes Telescope Project Cardiff University.

Deep Impact MissionSummary

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Comet Uncertainties Density? What lies beneath surface? Chemistry? Aging processes?

Page 29: Deep Impact First look inside a comet Dr. Paul Roche Faulkes Telescope Project Cardiff University.

Comet Aging

Build up of surface dust Lower albedo Large grains cannot leave Uneven surface jets Non gravitational acceleration

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Mission Profile

• Geocentric Dist 0.89 AU• Heliocentric Dist 1.49 AU

Primary Goal Differences between

interior and surface Pristine Solar System

material Secondary Goal

Cratering physics Assess comet impact

hazard Calibrate crater record Comet evolution

• 360 kg impactor• 10.2 km/s

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Approach & Encounter

Tempel-1Nucleus

Shield ModeAttitude through

Inner Coma

Science and Autonav Imaging to

Impact + 800 sec

ITM-1 StartE-88 min

ITM-2E-48 min

ITM-3E-15 min

Impactor ReleaseE-24 hours

TCA +TBD sec

AutoNav EnabledE-2 hr

Flyby S/CDeflection Maneuver

E-23.5 hr

2-wayS-band

Crosslink

500 km

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Spacecraft Overview

InstrumentsMRI, ITS, HRI

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Launch 12/1/05& First Light

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Flyby Simulation

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Ground Science Nucleus size and albedo Nucleus rotation Dust scattering properties

Dust / Gas evolution Education & Public Outreach program

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Summary

Deep Impact mission – live and exciting science

Studying properties of cometsFirst views “below surface”FTN will participate in scientific research

programmeOpportunities for schools involvement


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