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Jyoti Q Dahiya
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Space | Saturn

When the planet itself acts as your photographic filter, you can freak out on dimmer wavelengths.

Via +Pierre Markuse 

#space   #saturn  
 
A backlit Saturn

In this image taken by NASA's Cassini spacecraft we can see a backlit Saturn and its ring system. Saturn was shielding Cassini's camera from direct sunlight making this spectacular image possible. Infrared, red and violet spectral filters were combined to create this enhanced-color view. Cassini was at distance of approximately 800,000 kilometers (500,000 miles) from Saturn. Image scale at Saturn is about 50 kilometers (30 miles) per pixel.

The small dots in the lower left corner are two of Saturn's moons, Enceladus (the one closer to the rings) and Tethys.

More information here:
http://photojournal.jpl.nasa.gov/catalog/PIA14934

Another backlit Saturn image worth a look:
http://photojournal.jpl.nasa.gov/catalog/PIA08329

More on Saturn:
https://en.wikipedia.org/wiki/Saturn

More on Cassini:
http://saturn.jpl.nasa.gov/

Image credit: Saturn backlit by the Sun PIA14934: NASA/JPL-Caltech/Space Science Institute

#science   #saturn   #cassini   #enceladus   #tethys   #space   #photography   #spaceexploration   #solarsystem  
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Absolutely perfect 
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Stories on Google+ | Scii fi |+Emerson Fortier 

A sweet and melancholy story of an artist on the Moon, with an artform not ever seen before.

#storiesongoogleplus  
 
Hey all, I'm trying to get feedback on my story. I uploaded it to a contest and it needs reviews to qualify. It's a short read, and I'm hoping to make the story the center piece of a collection of shorts I'm going to self publish some time, so I'm hoping to use the reviews to try and fix it up a bit before then. So if you've got a minute, I would super appreciate the help! Thanks! You can find it at the link below. 
http://www.inkitt.com/stories/17158
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Space | Moonlanding

And, all those decades ago, they not only sent people to the Moon, they brought them back... So you not only had people reach the Moon, you also have them leave it. Why that hasn't inspired the most poignant poetry, I don't know.

From +Michael Interbartolo 

#space   #apollo11  
 
Man leaves the Moon for the first time
previous day -https://plus.google.com/116992234810067730471/posts/eZbzsuVKTio
July 21st 1969

1:11:13 am EST
After 22 hours on the surface of the moon, Luanr EVA operations is complete and the Crew closes the hatch for the last time in preparation of departing the surface.

9:44 a.m.
Shortly after arousing Collins, still circling the Moon in the Command/Service Module, Mission Control observes: "Not since Adam has any human known such solitude as Mike Collins is experiencing during this 47 minutes of each lunar revolution when he's behind the Moon with no one to talk to except his tape recorder aboard Columbia."

11:13 a.m.
The astronauts in Eagle are aroused. Aldrin announces: "Neil has rigged himself a really good hammock . . . and he's been Iying on the hatch and engine cover, and I curled up on the floor."

12:42 p.m.
Answering a question raised before they went to sleep, Aldrin reports: "We are in a boulder field where boulders range generally up to two feet, with a few larger than that... Some of the boulders are Iying on top of the surface, some are partially exposed, and some are just barely exposed."

1:52 pm EST
The Lunar Module ascent engine is ignited and departs to rendezvous with the waiting Mike Collins in the Command Module.

4:35 pm
The Ascent stage is docked with the Command Module. After more than hour of leak checks Buzz and Neil enter the Command Module.

6:41 pm
The crew jettisons the ascent stage and performs several seperation burns.


Radio Moscow makes a brief announcement: "Luna XV has. ..completed
its mission". In other words, the craft has crashed.
next day -https://plus.google.com/116992234810067730471/posts/RxDicxzY9fs
#apollo11  
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TO.on | Video

What, mere smile? Impossible not to LOL.

Via +JoeBrowns2ndchannel 

#toon   #funnygifs  
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Space | Mars

Curiosity is well named. Finding a rock with plenty of silica, it's turned around and gone back 150 metres or so to check on the rock again.

In a manner of anthropomorphising, of course.

But I'm excitedly waiting to see if it finds microbes there. Just imagine!

From +SPACE.com 

#curiosity   #mars   #space  
 
Measurements by Curiosity's rock-zapping ChemCam laser and another instrument revealed that a chunk of bedrock dubbed Elk contains high levels of silica and thus is a good candidate to preserve ancient organic molecules, if any exist in the area.
Measurements by Curiosity's rock-zapping ChemCam laser and another instrument revealed that a chunk of bedrock dubbed Elk contains high levels of silica and thus is a good candidate to preserve ancient organic molecules, if any exist in the area.
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Space | Earth

Atmospheric phenomena that are as beautiful as they are rare.

From +Astronomy Picture of the Day (APoD) via +Kam-Yung Soh 

#space   #rainbow   #anticrepuscularrays  
 
Rainbows and Rays over Bryce Canyon
Image Credit & Copyright: John Rummel
http://apod.nasa.gov/apod/ap150728.html

What's happening over Bryce Canyon? Two different optical effects that were captured in one image taken earlier this month. Both effects needed to have the Sun situated directly behind the photographer. The nearest apparition was the common rainbow, created by sunlight streaming from the setting sun over the head of the photographer, and scattering from raindrops in front of the canyon. If you look closely, even a second rainbow appears above the first. More rare, and perhaps more striking, are the rays of light that emanate out from the horizon above the canyon. These are known as anticrepuscular rays and result from sunlight streaming though breaks in the clouds, around the sky, and converging at the point 180 degrees around from the Sun. Geometrically, this antisolar point must coincide with the exact center of the rainbows. Located in Utah, USA, Bryce Canyon itself contains a picturesque array of ancient sedimentary rock spires known as hoodoos.
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Space | Not magic

How do we know what elements are there in a star, or whether it is coming closer or going away? Or how fast a galaxy is rotating?

Illumination comes from +Brian Koberlein 's post. (Pun intended!)

Edit: and when I read the comments on the OP, what do I find but:
" spectroscopy is magical, and amazes me still" - Carl Sagan

Well, well, well... magic?

#space   #spectroscopy   #physics   #history  
 
Along the Line

In the 1800s astronomers began to light from the Sun through a diffraction grating, which allowed them to view the Sun’s spectral lines. Thus began an area of astronomy known as spectroscopy. As the technology advanced enough to look at the spectra of stars, we were finally able to categorize stars by not just their temperatures, but by the elements contained in their atmospheres. We could also use the shift of these spectra due to the Doppler effect to determine a star’s motion. With modern telescopes we can do the same for galaxies using a method known as long-slit spectroscopy.

The idea of long-slit spectroscopy is to only observe the spectrum of an object along a narrow line. In the case of galaxies, this is typically along its long edge when a galaxy is viewed from mostly edge on. In this way we can look at the spectrum all along a galaxy. Because spectral lines are shifted toward the red or blue due to the motion of the source, the rotation of a galaxy gives a spectral line a shift. From this we can determine the motion of stars in the galaxy. This allows us to study things such as dark matter, which can affect the motion of stars.

Long-slit spectroscopy also allows us to study things such as the evolution of galaxies over time, and how the composition of stars can vary based upon their distance from the galactic core. Given how faint galaxies are compared to many stars, it’s actually a pretty amazing type of astronomy.
The idea of long-slit spectroscopy is to only observe the spectrum of an object along a narrow line. From this we can see the motion of stars in the galaxy.
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Space | Ceres

The Dawn spacecraft had some glitches, but now is back to work doing science orbits around Ceres.

Check out the video in the page. It shows the new closeups of the bright spots in Ceres' craters. (More on that in the next post).

From +SPACE.com 

#space   #ceres   #dawnspacecraft  
 
Dawn began spiraling down to its third Ceres science orbit on June 30 but experienced a problem almost immediately and went into a protective "safe mode." The mission team has now determined what happened and cleared Dawn to return to work.
Dawn began spiraling down to its third Ceres science orbit on June 30 but experienced a problem almost immediately and went into a protective "safe mode." The mission team has now determined what happened and cleared Dawn to return to work.
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Science fiction fan, voracious reader, loves puns, cartoons and pretty photos, and anything sciencey.
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Made it easier for people worldwide to take their spare tyre out of the boot; was the first person to realise software could be sold with advertising (was in print with this before hotmail was launched). Neither my spouse nor my kid hates me yet.
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Management consultant