This Illustration Shows The Cosmic Epochs Of Our Universe From The Big Bang To The Present. The Position

Each year we hold a Day of Remembrance. Today, Jan. 25, we pay will tribute to the crews of Apollo 1 and space shuttles Challenger and Columbia, as well as other NASA colleagues who lost their lives while furthering the cause of exploration and discovery. 

#NASARemembers

Learn more about the Day of Remembrance HERE. 

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Bioluminescent Plankton

Scientists have only recently discovered that this type of plankton glows when they are moved because of stress - ironic when you consider how relaxing the sight of the shimmering waves are in the dark night. Bioluminescence is used as a defence mechanism to draw predators towards the creature trying to eat the plankton. The tiny flashes of light also disorientate and surprise the predator.

These tiny organisms produce light using a chemical called luciferin. The process of creating a bioluminescent light, which is simply light produced within a living creature, differs between organisms. Some need a particular food or another creature for the effect to happen. But this type of plankton, called dinoflagellates, produce luciferin on their own. The light the tiny plankton emit is called ‘cold light’, meaning less than 20% of the light generates heat.

Huge areas of the ocean can become populated by glowing plankton but the effect is especially common in warm-water lagoons that have narrow openings to the sea. This causes the plankton to gather and become trapped, causing the water to turn orange.

Image credit: Will Ho, Kin Cheung, Landscapes Maldives & eyegami

Source: Kuoni

Colors of Earth

When we think of our globe from a distance, we generally visualize two colors: blue and green. Water and land. Mostly water, consequently, our planet’s nickname of the blue marble.

Traveling around the globe every 90 minutes covering millions of miles with a focused lens on our beautiful planet from 250 miles above, I’ve captured many beautiful colors beyond blue and green that showcase Earth in new and interesting ways. Some colors are indicative of nature like desert sands and weather like snow. Other colors tell stories of Earth’s climate in bright splashes of yellows and greens of pollen and muted grey tones and clouded filters of pollution.

Blue and green still remain vivid and beautiful colors on Earth from the vantage point of the International Space Station, but here are some other colors that have caught my eye from my orbital perspective.

African violet

Bahamas blues

Tropical in Africa

Yellow desert

Orange in Egypt

Red surprise 

Snow white 

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New Photographs From The European Space Agency

Solar system - Sun, Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune and Pluto

Credit: NASA, ESA, SDO, Messenger, Mariner 10, Apollo 17, Rosetta, Hubble, Cassini, Voyager 2 & New Horizons

Dazzling Photos Let You Orbit the Earth with Astronaut Tim Peake

Kepler-186f, the first Earth-size Planet in the Habitable Zone

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Boston Dynamics has shown off its new version of SpotMini, but now it’s also catching us up with its bipedal Atlas bot, the most humanoid of its creations. Atlas can now jump from elevated block to elevated block, and do a complete about-face in the air. It can leap pretty high, and also do a backflip – and then celebrate its backflipping ability. –

Beautiful Saturn, observed by the Cassini probe on November 27, 2013.

(Ian Regan)