Extreme Navigation NASA’s Discovery Missions: Stardust-NExT and EPOXI Missions NASA’s Discovery...

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Extreme Navigation NASA’s Discovery Missions: Stardust-NExT and EPOXI Missions NASA’s Discovery Missions: Stardust-NExT http:// stardustnext.jpl.nasa. gov EPOXI http://epoxi.umd.edu

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Transcript of Extreme Navigation NASA’s Discovery Missions: Stardust-NExT and EPOXI Missions NASA’s Discovery...

Page 1: Extreme Navigation NASA’s Discovery Missions: Stardust-NExT and EPOXI Missions NASA’s Discovery Missions: Stardust-NExT .

Extreme NavigationNASA’s Discovery

Missions:Stardust-NExT and EPOXI

MissionsNASA’s Discovery Missions:Stardust-NExThttp://stardustnext.jpl.nasa.gov

EPOXIhttp://epoxi.umd.edu

Page 2: Extreme Navigation NASA’s Discovery Missions: Stardust-NExT and EPOXI Missions NASA’s Discovery Missions: Stardust-NExT .

NASA Comet Explorations:Two Spacecraft, Three Comets, Four Missions,

Oh My!

Stardust Spacecraft First visited comet Wild 2 (“vilt 2”) now heading to comet Tempel 1

Deep Impact Spacecraft First journeyed to Tempel 1, now heading to comet Hartley 2

Page 3: Extreme Navigation NASA’s Discovery Missions: Stardust-NExT and EPOXI Missions NASA’s Discovery Missions: Stardust-NExT .

What are Comets?• They contain a high percentage of rocky organic materials and ices

– Ices include water, CO2, methane ices

• Solid nuclei are generally smaller than asteroids – on average a few km in diameter

• They are left over “bits” or remnants from the formation of the Solar System– Believed to originate in either the

• Oort Cloud (long period)

• Kuiper Belt (short period)

Comet McNaught in 2007 over Australia

by Akira Fujii

Page 4: Extreme Navigation NASA’s Discovery Missions: Stardust-NExT and EPOXI Missions NASA’s Discovery Missions: Stardust-NExT .

Comet Anatomy

Nucleus: “dirty ice ball” (ice, dust, and rocky debris) usually only 1-10km across, but as big as 10 km in diameter and the only substantial part of the comet.

Coma: a cloud of water vapor, carbon dioxide, and other gases which sublimed off the nucleus and contain very little mass.

FACT: The coma and tail can be as large as Jupiter (about 10x’s the diameter of Earth). Together forming the head of the comet.

Tail:o Dust tail: composed of small (smoke-sized) dust particles driven off the nucleus by escaping

gases, making it the easiest to see.

o Ion Tail: composed of plasma (ionized gases) and created by interaction with solar winds. FACT: The ion tail can be as much as 1-2 AU (150-300 million km) when the comet is near

the Sun.

o Sodium Tail: composed of sodium ions, yellowish, challenge to perceive and many questions

Page 5: Extreme Navigation NASA’s Discovery Missions: Stardust-NExT and EPOXI Missions NASA’s Discovery Missions: Stardust-NExT .

Nucleus Dust Tail

Coma Ion Tail

Page 6: Extreme Navigation NASA’s Discovery Missions: Stardust-NExT and EPOXI Missions NASA’s Discovery Missions: Stardust-NExT .

Comet Action

Page 7: Extreme Navigation NASA’s Discovery Missions: Stardust-NExT and EPOXI Missions NASA’s Discovery Missions: Stardust-NExT .

The orbital paths of the comets EPOXI and SD-NExT are visiting in 2010 and 2011

Page 8: Extreme Navigation NASA’s Discovery Missions: Stardust-NExT and EPOXI Missions NASA’s Discovery Missions: Stardust-NExT .

EPOXI’s trajectoryto comet Hartley 2

Page 9: Extreme Navigation NASA’s Discovery Missions: Stardust-NExT and EPOXI Missions NASA’s Discovery Missions: Stardust-NExT .

Discover More!

Stardust-NExThttp://stardustnext.jpl.nasa.gov

EPOXIhttp://epoxi.umd.edu

NASA’s Discovery and New Frontiershttp://discoverynewfrontiers.nasa.gov


NASA’s Kepler and K2 Missions:

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Stardust NExT

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5 Space Technology “Paving the Way for Future Micro-Satellite Missions” 1 NASA’s Space Technology 5 Mission NSF workshop on Small Satellite Missions for.

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Robotic Missions in Support of Human Lunar Operations€¦ · Robotic Missions in Support of Human Lunar Operations Christopher R King ... perhaps NASA’s exit strategy for the moon

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NASA · RESULTS IN BRIEF NASA’s Heliophysics Portfolio May 7, 2019 NASA Office of Inspector General Office of Audits IG-19-018 (A-18-001-00) NASA’s space missions and much of

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STARDUST TYPE - Harco Loorharcoloorlighting.com/.../08/stardust-SUSPENSION.pdf · STARDUST 120V Suspension 10 PL/w L Ø 29 11 STARDUST HL Ø 38 STARDUST ø 38 cm (15") 20 cm (7.9")

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