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Juno. CRATER COMPARISONS. Imaging Systems are an important aspect of almost every mission . Images help tell the “planetary story”. Nikon Cameras. Framing Camera. Mercury Dual Imaging System (MDIS). International Space Station. MESSENGER. Image Credits: NASA. CRATER COMPARISONS.

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Juno

CRATER COMPARISONS

Imaging Systems are an important aspect of almost every mission. Images help tell the “planetary story”.

Nikon Cameras

Framing Camera

Mercury Dual Imaging System (MDIS)

International Space Station

MESSENGER

Image Credits: NASA


CRATER COMPARISONS

Images of impact craters provide important clues about the “story” (history) of a planetary surface…

Image Credits: NASA


Earth Earth’s Moon Mars

Mercury Asteroid Vesta

Images not to scale

Image Credits: NASA


Impact craters begin to tell the story….

YouTube Video – Crater Formation: Glass bead into sand: http://youtu.be/4z5oRJOyKpg


Thinking about SCALE

A. Image area B. Size of craters C. Degradation

Earth’s Moon

Mars

Image Credits: NASA


CRATER OBSERVATIONS

  • Estimage

  • Image area

  • # of craters

  • Observe

  • craters 1, 2, & 3:

    • Diameter

    • Level of degradation (low, medium, high)

    • General “shape” observations

1

3

Mars

2

Image Credit: NASA


CRATER TYPE & CLASSIFICATION

Relative age and degree of modification

  • Crater 1:

  • Type: Simple

  • Classification: Preserved (fresh)

  • Crater 2:

  • Type: Complex

  • Classification: Modified

  • Crater 3:

  • Type: Complex

  • Classification: Destroyed (Highly degraded)

1

3

Mars

2

Image Credit: NASA


CRATER DENSITY: Relative Age

MORE CRATERS = OLDER SURFACE

Mars

Image Credits: NASA


(Fresh)

(Highly degraded)


“Read” the story of your planetary world...

Each group will:

1) Log observations of 3-5 images

2) Discuss observations & inferences

RECOMMENDATION

Browse entire set of images first

(make initial inferences about the relative age of your world)


Discuss

What general inferences about the history of this planetary world as a whole?

What additional data/information would be beneficial to have?

Discuss



CRATER COMPARISON ACTIVITY

CLOSING REMARKS

  • Application of widely used scientific principles

  • Crater Density: Be aware and careful!

    • Most appropriate when comparing areas of equal sizes

  • Discussion Questions Follow-up:

    • Can you make general inferences about the history of this planetary world as a whole? Explain.

    • What additional data/information would be helpful to have?

  • Sharing observations of each planetary world


Impact craters help tell the story of a surface, region, planetary world, and our Solar System!

Credit: NASA/JPL

Image Credits: NASA/Lunar Reconnaissance Orbiter

Image Credits: NASA


CRATER COMPARISONS

Practice of Scientists: NGSS

An “all-inclusive” set of resources: guides, images, strategies

Designed engage learners in the Process of Science.

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