moon_formation_processes.ppt

8/19/2019 moon_formation_processes.ppt

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How are they diferent?

By the Lunar and Planetary Institute

For use in teacher workshops

Moon Formation / Processes

http://solarsystem.nasa.gov/multimedia/gallery/Earth_Moon.jpghttp://solarsystem.nasa.gov/multimedia/gallery/Earth_Moon.jpghttp://solarsystem.nasa.gov/multimedia/gallery/Earth_Moon.jpg


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Earth

7930 miles (12 7!"#3 $m%diameter

23 de&ree a'is tilt(seasons %

)*r+ace tem,s -73 to . ( 100 to 120F%

hic$ atmos,here mild&reenho*se efect

-

21"0 miles (3.7" $m%diameter

7 de&ree tilt (5noseasons%

)*r+ace tem,s 107 to-1!3 (22. F to -2.3F%

6o atmos,here

Moon


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Earth Moon

6o Ma&netic Field)mall Moon *a$es)mall :fset ore

http://www.windows.ucar.edu/tour/link=/earth/moon/earthmoon_interior_gif_image.html


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Earth;s Moon

< How did o*r Moon +orm?

< =hat;s >een ha,,enin& since?


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+ew data to ,onder #

ower density - @li&hterA relatiBe to ,lanets

ess iron than whole Earthmore al*min*m andtitani*m

Moon;s chemical si&nat*re 5Earth;s mantle


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How Cid the Moon Form?

+ew more data to,onder

Coes not or>it ine4*atorial ,lane o+Earth or ecli,tic

Earth/Moon hi&h an&*larmoment*m


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*nar Formation Models

he moon is a sister world that +ormedin or>it aro*nd Earth as the Earth+ormed#

he moon +ormed somewhere else inthe solar system then was ca,t*redinto or>it aro*nd Earth#

Early Earth s,*n so +ast that it s,*n ofthe moon#


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8m,act >y Mars-sized ,roto ,lanet

4.5 >illion yearsa&o

E',lainsD< hemistry< :r>it

< Hi&h an&*larmoment*m


9/40 o,yri&hted P


10/40 o,yri&hted P


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12/40 o,yri&hted P


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o,yri&hted P


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*nar eolo&ic History


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.#! >illion years a&o o*r Moon+orms

(l*nar roc$s and meteorites%


o,yri&hted P


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o,yri&hted P


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Ma&ma :cean oc$s

"002!northosite

.#.. .#!1 a9!G Pla& Feld(anorthite%Ma&ma :cean

7"!3! roctolite

.#2 .#3 a


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Highlands li&htro*&h ( errae%

Mostly anorthosite

(,la&ioclase +elds,ars lots o+ calci*m

and al*min*m%

@8n ,laceA roc$s are.#! to .#3 >illionyears old



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*nar 8m,act Basins

8m>ri*m im :rientaleasinBig frequent im,acts *ntil 3# >illion years a&o

Impact events continue on all moons and planets


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reccias and 8m,act Melts

1!..!8m,act melt I clasts

"701"Polymictreccia


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*nar eolo&ic HistoryMare Jolcanism

)= Mare8m>ri*m

Mare 8m>ri*mJolcanism after im,acts - most >e+ore 3 a (to 1


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*nar Jolcanism

ristarch*sPlatea*

Mari*s


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aBa *>es

Apollo 17


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*nar asalts

1!!!!

1!01"

3#3 a


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Lowlands - dar$smooth Maria (1"G%

asalt - Kne &rained dar$i&neo*s roc$ rich iniron and ma&nesi*m(st*f that san$ inma&ma ocean%

Few h*ndred metersthic$

Rocks are .#3 to 3#1>illion years old

Bolcanic Lows asrecently as 1 >illion

*nar eolo&icHistory


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nd then #

ll was 4*iet#


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< E'ce,t +or im,acts###

7 6oBem>er 530 l> 6

3 m wide crater (estim ate%

http://volcanoes.usgs.gov/Imgs/Jpg/Photoglossary/lavatube1_large.jpghttp://volcanoes.usgs.gov/Imgs/Jpg/Photoglossary/lavatube1_large.jpghttp://volcanoes.usgs.gov/Imgs/Jpg/Photoglossary/lavatube1_large.jpghttp://volcanoes.usgs.gov/Imgs/Jpg/Photoglossary/lavatube1_large.jpg


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< 6o =ind< 6o Flowin& =ater< 6o Erosion


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< E'ce,t +or im,acts###


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How are they diferent in terms o+&eolo&ic ,rocesses?

nd =HN ?


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Earth

ctiBe wind/watererosion

8m,acts

ctiBe Bolcanoes

Earth4*a$es

ctiBe ma&netic Keld

Few craters

eolo&ically ctiBe

Moon

6: ctiBe wind/watererosion

8m,acts

6: actiBe Bolcanoes

)mall moon4*a$es

6: actiBe ma&netic Keld

*c$ets o+ craters

eolo&ically 8nactiBe

E h M


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Earth

Plate

tectonicsecycles

Moon

6: ,late tectonics


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Earth Moon

H: 6ot so hot

=hy so diferent?


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=hat;s :*r Plan +or ),ace?

< Fly the sh*ttle as sa+ely as,ossi>le *ntil 2010

< om,lete the 8)) - ",erson crew >y 2009

< li&n science e',lorationand aerona*tics to s*,,orth*man s,ace Li&ht

< rin& the new rewE',loration Jehicle - EJ on line

< Esta>lish a l*nar ,ro&ramthat in+orms +*t*remissions to Mars and otherdestinations

http://solarsystem.nasa.gov/multimedia/gallery/Earth_Moon.jpghttp://solarsystem.nasa.gov/multimedia/gallery/Earth_Moon.jpghttp://solarsystem.nasa.gov/multimedia/gallery/Earth_Moon.jpghttp://solarsystem.nasa.gov/multimedia/gallery/Earth_Moon.jpghttp://solarsystem.nasa.gov/multimedia/gallery/Earth_Moon.jpghttp://solarsystem.nasa.gov/multimedia/gallery/Earth_Moon.jpghttp://solarsystem.nasa.gov/multimedia/gallery/Earth_Moon.jpghttp://solarsystem.nasa.gov/multimedia/gallery/Earth_Moon.jpghttp://solarsystem.nasa.gov/multimedia/gallery/Earth_Moon.jpghttp://solarsystem.nasa.gov/multimedia/gallery/Earth_Moon.jpghttp://solarsystem.nasa.gov/multimedia/gallery/Earth_Moon.jpghttp://solarsystem.nasa.gov/multimedia/gallery/Earth_Moon.jpghttp://solarsystem.nasa.gov/multimedia/gallery/Earth_Moon.jpghttp://solarsystem.nasa.gov/multimedia/gallery/Earth_Moon.jpghttp://solarsystem.nasa.gov/multimedia/gallery/Earth_Moon.jpg


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=hy?

< )et *, +or the Krst time a +*ll Led&ed ha>itaton another world#

< est adBanced s,aces*its and roBers#< ry o*t methods +or ,rotectin& e',lorers +rom

deadly radiation#< earn to o,erate cr*cial li+e s*,,ort and ,ower

needed on Mars#< a*&e the efects o+ the a>sence o+ normal

&raBity on the >ody#

< 6ew technolo&y#


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et*rn to the Moon handryaan - 2007

: - 200

8denti+y eso*rces

Ma, the )*r+ace


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et*rn to the Moon

< 2012 - CeBelo, and testtechnolo&ies +or reso*rce*tiliOationcomm*nications ,ower

< 201. - EJ res la*nchBehicle


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• 2018 – Humans for week-long stays• Next: 45-day stays at outposts


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moon_formation_processes.ppt

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