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the next 20 years are going to be exciting as feck!!0
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MrStabbems wrote: »the next 20 years are going to be exciting as feck!!
The last 20 years certainly have been. And the 20 years before that. And...0 -
Venus Cloud Tops Viewed by Hubble. This is a NASA Hubble Space Telescope ultraviolet-light image of the planet Venus, taken on January 24 1995, when Venus was at a distance of 70.6 million miles 113.6 million kilometers from Earth.
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Venus - False Color of Bereghinya Planitia
This false color image from NASA Magellan spacecraft shows a portion of Bereghinya Planitia plains in the northern hemisphere of Venus.1 -
View of STS-134 MS Feustel during EVA-1
View of STS-134 Mission Specialist (MS-3) Andrew Feustel working to install a new Materials International Space Station Experiment (MISSE) on the EXPRESS (Expedite the Processing of Experiments to Space Station) Logistics Carrier 2 (ELC2) during the first session of Extravehicular Activity (EVA-1).1 -
Flyaround view of the ISS taken from STS-123 Space Shuttle Endeavor
View of Materials International Space Station Experiment (MISSE) 6 Passive Experiment Container (PEC) on European Laboratory/Columbus. Photo was taken during flyaround of STS-123 Space Shuttle Endeavor.1 -
Springtime on Mars: Hubble Best View of the Red Planet
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Diagram of Lake Stratification on Mars
This diagram presents some of the processes and clues related to a long-ago lake on Mars that became stratified, with the shallow water richer in oxidants than deeper water was.
The sedimentary rocks deposited within a lake in Mars' Gale Crater more than three billion years ago differ from each other in a pattern that matches what is seen in lakes on Earth. As sediment-bearing water flows into a lake, bedding thickness and particle size progressively decrease as sediment is deposited in deeper and deeper water as seen in examples of thick beds (PIA19074) from shallowest water, thin beds (PIA19075) from deeper water and even thinner beds (PIA19828) from deepest water.
At sites on lower Mount Sharp, inside the crater, measurements of chemical and mineral composition by NASA's Curiosity Mars rover reveal a clear correspondence between the physical characteristics of sedimentary rock from different parts of the lake and how strongly oxidized the sediments were. Rocks with textures indicating that the sediments were deposited near the edge of a lake have more strongly oxidized composition than rocks with textures indicating sedimentation in deep water.
For example, the iron mineral hematite is more oxidized than the iron mineral magnetite. An explanation for why such chemical stratification occurs in a lake is that the water closer to the surface is more exposed to oxidizing effects of oxygen in the atmosphere and ultraviolet light.
On Earth, a stratified lake with a distinct boundary between oxidant-rich shallows and oxidant-poor depths provides a diversity of environments suited to different types of microbes. If Mars has ever hosted microbial live, the stratified lake at Gale Crater may have similarly provided a range of different habitats for life.1 -
Sedimentary Signs of a Martian Lakebed
This evenly layered rock photographed by the Mast Camera Mastcam on NASA Curiosity Mars Rover on Aug. 7, 2014, shows a pattern typical of a lake-floor sedimentary deposit not far from where flowing water entered a lake.1 -
Martian Rock Evidence of Lake Currents
Cross-bedding seen in the layers of this Martian rock is evidence of movement of water recorded by the waves or ripples of loose sediment the water passed over, such as a current in a lake.
This image is from NASA Curiosity Mars rover.1 -
Mimas Dwarfed
From high above Saturn's northern hemisphere, NASA's Cassini spacecraft gazes over the planet's north pole, with its intriguing hexagon and bullseye-like central vortex.
Saturn's moon Mimas is visible as a mere speck near upper right. At 246 miles (396 kilometers across) across, Mimas is considered a medium-sized moon. It is large enough for its own gravity to have made it round, but isn't one of the really large moons in our solar system, like Titan. Even enormous Titan is tiny beside the mighty gas giant Saturn. This view looks toward Saturn from the sunlit side of the rings, from about 27 degrees above the ring plane.
The image was taken in green light with the Cassini spacecraft wide-angle camera on March 27, 2017.
The view was acquired at a distance of approximately 617,000 miles (993,000 kilometers) from Saturn.
Image scale is 37 miles (59 kilometers) per pixel. Mimas' brightness has been enhanced by a factor of 3 in this image to make it easier to see.2 -
NASA's MISR Spots Alaskan Volcano's Latest Eruption
The tiny Aleutian island of Bogoslof in Alaska, erupting regularly since December 2016, produced fresh activity on Sunday, May 28, 2017.
Bogoslof is a stratovolcano fueled by the subduction of the Pacific Plate under the North American Plate and forms part of the larger Aleutian Arc, which includes more than 60 volcanoes on the Aleutian Islands and the Aleutian Range on the Alaska mainland.
Previous to its recent period of activity, Bogoslof had last erupted in 1992, and its above-water surface area was a mere 0.11 square miles (0.29 square kilometers). As of March 11, the most recent data available, the area of the island had tripled to 0.38 square miles (0.98 square kilometers).
The event on May 28 produced an ash cloud that reached 40,000 feet (12 km) in altitude, causing the Alaskan Volcano Observatory to issue a red alert for air travel in the area. Volcanic ash can cause major damage to aircraft engines, and the region is close to several major air routes between North America and Asia.
On May 28, 2017, at approximately 2:23 p.m. local time, NASA's Terra satellite passed over Bogoslof, less than 10 minutes after the eruption began.
MISR has nine cameras that view Earth at different angles. It takes slightly less than seven minutes for all nine cameras to view the same location on Earth. An animation made from the images from the nine MISR cameras, captured between 2:19 and 2:26 p.m., demonstrates how the angled views give a glimpse of the underside of the growing plume of volcanic ash, showing the eruption column widening into the cloud at the top. The animation is available at https://photojournal.jpl.nasa.gov/catalog/PIA21655
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I stood on the surface of Mars on Sunday.
Well, not really... but hubby has a VR headset and there was a "room" available that was built from NASA's data on the Martian surface. I stood next to Curiosity, and moved around a bit admiring some views and reading some info. It was awesome!
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I stood on the surface of Mars on Sunday.
Well, not really... but hubby has a VR headset and there was a "room" available that was built from NASA's data on the Martian surface. I stood next to Curiosity, and moved around a bit admiring some views and reading some info. It was awesome!
I wanna go! Can I? Please?0 -
vikinglander wrote: »I stood on the surface of Mars on Sunday.
Well, not really... but hubby has a VR headset and there was a "room" available that was built from NASA's data on the Martian surface. I stood next to Curiosity, and moved around a bit admiring some views and reading some info. It was awesome!
I wanna go! Can I? Please?
Come on over!0 -
vikinglander wrote: »I stood on the surface of Mars on Sunday.
Well, not really... but hubby has a VR headset and there was a "room" available that was built from NASA's data on the Martian surface. I stood next to Curiosity, and moved around a bit admiring some views and reading some info. It was awesome!
I wanna go! Can I? Please?
Come on over!
I meant, 'I really wanna go'...to Mars!0 -
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A Cauldron of Stars at the Galaxy Center
This dazzling infrared image from NASA Spitzer Space Telescope shows hundreds of thousands of stars crowded into the swirling core of our spiral Milky Way galaxy.3 -
vikinglander wrote: »vikinglander wrote: »I stood on the surface of Mars on Sunday.
Well, not really... but hubby has a VR headset and there was a "room" available that was built from NASA's data on the Martian surface. I stood next to Curiosity, and moved around a bit admiring some views and reading some info. It was awesome!
I wanna go! Can I? Please?
Come on over!
I meant, 'I really wanna go'...to Mars!
Sign up here!
http://www.mars-one.com/0 -
ya'll see the black hole merger gravity ripple story?0
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