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Earth Observatory

Planetary Analogs

A Most Unusual Lake

Lake Unter-See in Antarctica, sealed beneath thick ice, contains unusually high levels of dissolved oxygen and cone-shaped microbial reefs resembling some of Earth’s oldest fossils.

Posted March 11, 2026

Earth Observatory

March 2026 Satellite Puzzler

Your challenge is to tell us the location of the satellite image and why it is interesting.

Posted March 10, 2026

Earth Observatory

Sun-Earth Interactions

Visible Infrared Imaging Radiometer Suite (VIIRS)

Shades of a Lunar Eclipse

A series of nighttime satellite images revealed how moonlight reaching Earth varied throughout a total lunar eclipse.

Posted March 10, 2026

Earth Observatory

Oceans

Ailing “Megaberg” Sparks Surge of Microscopic Life

As Iceberg A-23A disintegrated, it shed meltwater that helped fuel an extensive phytoplankton bloom in the South Atlantic Ocean.

Posted March 6, 2026

Apollo

Earth Observatory

Human Dimensions

Landsat 8 / LDCM (Landsat Data Continuity Mission)

A Little Town with a Long Name

A NASA luminary from the Apollo era grew up in Wales near Llanfairpwllgwyngyllgogerychwyrndrobwllllantysiliogogogoch.

Posted March 5, 2026

Earth Observatory

Landsat 8 / LDCM (Landsat Data Continuity Mission)

Searching for Selenite

Oklahoma’s Salt Plains National Wildlife Refuge attracts rare and diverse species—and enthusiasts looking for a distinct type of crystallized gypsum.

Posted March 4, 2026

Aqua

Earth Observatory

Moderate Resolution Imaging Spectroradiometer (MODIS)

Smoke Rises Over Big Cypress National Preserve

The National fire has burned tens of thousands of acres within the Florida preserve, fueled by vegetation dried by prolonged drought and killed by recent frost.

Posted March 3, 2026

Earth Observatory

Earth Surface & Interior

Landsat 8 / LDCM (Landsat Data Continuity Mission)

Mars Reconnaissance Orbiter (MRO)

Planetary Analogs

Scoria Cones on Earth and Mars

The hill-shaped features are a sign of explosive volcanic activity—a rarity on the Red Planet.

Posted March 2, 2026

Earth Observatory

Extreme Weather Events

Sea Ice

Chesapeake Bay Locked in Ice

Nearly 50 years ago, the first Landsat satellite captured the rare sight of Mid-Atlantic waterways frozen over.

Posted February 27, 2026

Earth Observatory

Extreme Weather Events

Floods

Dry-Season Floods Drench Northern Colombia

Villages and farmland were swamped after unusually heavy early-February rains pushed the Sinú River over its banks.

Posted February 26, 2026

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7

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46

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28

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80

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7

2

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23

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2

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36

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8

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4

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4

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5

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3

6

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3

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2

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41

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8

3

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5

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2

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32

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17

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3

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47

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25

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2

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1

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9

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14

1

6

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6

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2

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14

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21

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6

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1

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14

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29

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54

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13

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3

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10

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22

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42

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4

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2

4

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3

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45

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28

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29

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63

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220

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46

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