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Astronomy Picture of the Day -- Dark Sand Cascades on Mars
NASA ^
| November 29, 2015
| (see photo credit)
Posted on 11/30/2015 9:43:23 AM PST by SunkenCiv
Explanation: They might look like trees on Mars, but they're not. Groups of dark brown streaks have been photographed by the Mars Reconnaissance Orbiter on melting pinkish sand dunes covered with light frost. The above image was taken in 2008 April near the North Pole of Mars. At that time, dark sand on the interior of Martian sand dunes became more and more visible as the spring Sun melted the lighter carbon dioxide ice. When occurring near the top of a dune, dark sand may cascade down the dune leaving dark surface streaks -- streaks that might appear at first to be trees standing in front of the lighter regions, but cast no shadows. Objects about 25 centimeters across are resolved on this image spanning about one kilometer. Close ups of some parts of this image show billowing plumes indicating that the sand slides were occurring even while the image was being taken.
(Excerpt) Read more at 129.164.179.22 ...
TOPICS: Astronomy; Astronomy Picture of the Day; Science
KEYWORDS: apod; astronomy; mars; science
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[Credit: HiRISE, MRO, LPL (U. Arizona), NASA]
1
posted on
11/30/2015 9:43:23 AM PST
by
SunkenCiv
To: brytlea; cripplecreek; decimon; bigheadfred; KoRn; Grammy; steelyourfaith; Mmogamer; dayglored; ...
2
posted on
11/30/2015 9:44:15 AM PST
by
SunkenCiv
(Here's to the day the forensics people scrape what's left of Putin off the ceiling of his limo.)
To: SunkenCiv
Looks like whipped/torn scrub on a beach
If that's REALLY Mars ... we know NOTHING about God's marvelous hand !
3
posted on
11/30/2015 9:45:01 AM PST
by
knarf
(I say things that are true .... I have no proof ... but they're true.)
4
posted on
11/30/2015 9:47:26 AM PST
by
SunkenCiv
(Here's to the day the forensics people scrape what's left of Putin off the ceiling of his limo.)
To: SunkenCiv
5
posted on
11/30/2015 9:49:15 AM PST
by
Darksheare
(Those who support liberal "Republicans" summarily support every action by same.)
To: SunkenCiv
6
posted on
11/30/2015 9:53:17 AM PST
by
JoeProBono
(SOME IMAGES MAY BE DISTURBING ’VIEWER DISCRETION IS ADVISED;-{)
To: SunkenCiv
Spice Blow...................wormsign................
7
posted on
11/30/2015 9:55:52 AM PST
by
Red Badger
(READ MY LIPS: NO MORE BUSHES!...............)
To: SunkenCiv
To: JoeProBono
Not a bad idea... other than the company itself... strawberry or pomegranate ice cream with Oreo crumbles and chunks of the actual fruit (in the case of strawberry).
9
posted on
11/30/2015 9:59:58 AM PST
by
SunkenCiv
(Here's to the day the forensics people scrape what's left of Putin off the ceiling of his limo.)
To: Red Badger; Darksheare
10
posted on
11/30/2015 10:00:33 AM PST
by
SunkenCiv
(Here's to the day the forensics people scrape what's left of Putin off the ceiling of his limo.)
To: knarf
It’s a really nice trompe-l’oeil, the apparently standing objects are tracks running downhill on the mostly gently rolling country. Mars has an atmospheric pressure at the surface about the same as what it is 40 miles altitude over the Earth. IOW, basically no air to speak of.
11
posted on
11/30/2015 10:03:32 AM PST
by
SunkenCiv
(Here's to the day the forensics people scrape what's left of Putin off the ceiling of his limo.)
To: Red Badger; SunkenCiv
The worm is the spice, the spice is the worm!
12
posted on
11/30/2015 10:06:00 AM PST
by
Darksheare
(Those who support liberal "Republicans" summarily support every action by same.)
To: Red Badger; SunkenCiv
13
posted on
11/30/2015 10:07:16 AM PST
by
Darksheare
(Those who support liberal "Republicans" summarily support every action by same.)
To: Darksheare
14
posted on
11/30/2015 10:27:05 AM PST
by
Red Badger
(READ MY LIPS: NO MORE BUSHES!...............)
To: Darksheare
P-I-N-G-O.........P-I-N-G-O........P-I-N-G-O........and PINGO is its name-o........................
15
posted on
11/30/2015 10:28:39 AM PST
by
Red Badger
(READ MY LIPS: NO MORE BUSHES!...............)
To: Red Badger
Cats would be the bearers of gom jobbered claws.
Hmm.
16
posted on
11/30/2015 10:55:41 AM PST
by
Darksheare
(Those who support liberal "Republicans" summarily support every action by same.)
To: Red Badger
It really is as bizarre as the name sounds.
Even better, if the water flow inside the Pingo is enough, it bursts through as a frozen spring and forms a slowly melting “spire”.
17
posted on
11/30/2015 10:57:52 AM PST
by
Darksheare
(Those who support liberal "Republicans" summarily support every action by same.)
To: Darksheare
Pre-Spice Blow....................
18
posted on
11/30/2015 11:17:02 AM PST
by
Red Badger
(READ MY LIPS: NO MORE BUSHES!...............)
To: Darksheare
19
posted on
11/30/2015 11:18:23 AM PST
by
Red Badger
(READ MY LIPS: NO MORE BUSHES!...............)
To: SunkenCiv
I always thought more of Isaac Asimov. He got me through 16 semester hours of chemistry and biochem.
20
posted on
11/30/2015 1:37:28 PM PST
by
dsc
(Any attempt to move a government to the left is a crime against humanity.)
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