Tumblelog by Soup.io
Newer posts are loading.
You are at the newest post.
Click here to check if anything new just came in.

September 20 2017

8229 f40d 500

Bottle broken, probably leaky

8230 42d6 500

Still by @danieljrussellphotography

8231 93e2 500

By @danieljrussellphotography

September 19 2017

6109 b01f 500

It arrrrrriiived \o/ <3 @nuohooja

September 17 2017

5208 d45b 500

Indecisive coffee is indecisive

September 16 2017

Cassini Spacecraft: Top Discoveries

nasa:

Our Cassini spacecraft has been exploring Saturn, its stunning rings and its strange and beautiful moons for more than a decade.

image

Having expended almost every bit of the rocket propellant it carried to Saturn, operators are deliberately plunging Cassini into the planet to ensure Saturn’s moons will remain pristine for future exploration – in particular, the ice-covered, ocean-bearing moon Enceladus, but also Titan, with its intriguing pre-biotic chemistry.

Let’s take a look back at some of Cassini’s top discoveries:  

Titan

image

Under its shroud of haze, Saturn’s planet-sized moon Titan hides dunes, mountains of water ice and rivers and seas of liquid methane. Of the hundreds of moons in our solar system, Titan is the only one with a dense atmosphere and large liquid reservoirs on its surface, making it in some ways more like a terrestrial planet.

image

Both Earth and Titan have nitrogen-dominated atmospheres – over 95% nitrogen in Titan’s case. However, unlike Earth, Titan has very little oxygen; the rest of the atmosphere is mostly methane and traced amounts of other gases, including ethane.

image

There are three large seas, all located close to the moon’s north pole, surrounded by numerous smaller lakes in the northern hemisphere. Just one large lake has been found in the southern hemisphere.

Enceladus

image

The moon Enceladus conceals a global ocean of salty liquid water beneath its icy surface. Some of that water even shoots out into space, creating an immense plume!

image

For decades, scientists didn’t know why Enceladus was the brightest world in the solar system, or how it related to Saturn’s E ring. Cassini found that both the fresh coating on its surface, and icy material in the E ring originate from vents connected to a global subsurface saltwater ocean that might host hydrothermal vents.

image

With its global ocean, unique chemistry and internal heat, Enceladus has become a promising lead in our search for worlds where life could exist.

Iapetus

image

Saturn’s two-toned moon Iapetus gets its odd coloring from reddish dust in its orbital path that is swept up and lands on the leading face of the moon.

image

The most unique, and perhaps most remarkable feature discovered on Iapetus in Cassini images is a topographic ridge that coincides almost exactly with the geographic equator. The physical origin of the ridge has yet to be explained…

image

It is not yet year whether the ridge is a mountain belt that has folded upward, or an extensional crack in the surface through which material from inside Iapetus erupted onto the surface and accumulated locally.

Saturn’s Rings

image

Saturn’s rings are made of countless particles of ice and dust, which Saturn’s moons push and tug, creating gaps and waves.

image

Scientists have never before studied the size, temperature, composition and distribution of Saturn’s rings from Saturn obit. Cassini has captured extraordinary ring-moon interactions, observed the lowest ring-temperature ever recorded at Saturn, discovered that the moon Enceladus is the source for Saturn’s E ring, and viewed the rings at equinox when sunlight strikes the rings edge-on, revealing never-before-seen ring features and details.

image

Cassini also studied features in Saturn’s rings called “spokes,” which can be longer than the diameter of Earth. Scientists think they’re made of thin icy particles that are lifted by an electrostatic charge and only last a few hours.  

Auroras

image

The powerful magnetic field that permeates Saturn is strange because it lines up with the planet’s poles. But just like Earth’s field, it all creates shimmering auroras.

image

Auroras on Saturn occur in a process similar to Earth’s northern and southern lights. Particles from the solar wind are channeled by Saturn’s magnetic field toward the planet’s poles, where they interact with electrically charged gas (plasma) in the upper atmosphere and emit light.  

Turbulent Atmosphere

image

Saturn’s turbulent atmosphere churns with immense storms and a striking, six-sided jet stream near its north pole.

image

Saturn’s north and south poles are also each beautifully (and violently) decorated by a colossal swirling storm. Cassini got an up-close look at the north polar storm and scientists found that the storm’s eye was about 50 times wider than an Earth hurricane’s eye.

image

Unlike the Earth hurricanes that are driven by warm ocean waters, Saturn’s polar vortexes aren’t actually hurricanes. They’re hurricane-like though, and even contain lightning. Cassini’s instruments have ‘heard’ lightning ever since entering Saturn orbit in 2004, in the form of radio waves. But it wasn’t until 2009 that Cassini’s cameras captured images of Saturnian lighting for the first time.

image

Cassini scientists assembled a short video of it, the first video of lightning discharging on a planet other than Earth.

image

Cassini’s adventure will end soon because it’s almost out of fuel. So to avoid possibly ever contaminating moons like Enceladus or Titan, on Sept. 15 it will intentionally dive into Saturn’s atmosphere.

image

The spacecraft is expected to lose radio contact with Earth within about one to two minutes after beginning its decent into Saturn’s upper atmosphere. But on the way down, before contact is lost, eight of Cassini’s 12 science instruments will be operating! More details on the spacecraft’s final decent can be found HERE.

Make sure to follow us on Tumblr for your regular dose of space: http://nasa.tumblr.com

September 15 2017

1223 6299 500

at Arinas Café

September 10 2017

1393 3bf5 500

at Arinas Café

September 09 2017

3204 016a 500

Das geht bestimmt als Allegorie durch. (at Arinas Café)

September 07 2017

8085 e2e6

Always carry a glitched version of your avatar in case of emergency.

September 04 2017

7167 22bf 500

astronomyblog:

This illustration shows the approximate size of the red supergiant UY Scuti compared to the Sun.

UY Scuti is a bright red supergiant and pulsating variable star in the constellation Scutum. It is a current and leading candidate for being the largest known star by radius and is also one of the most luminous of its kind. It has an estimated radius of 1,708 solar radii; thus a volume nearly 5 billion times that of the Sun. It is approximately 2.9 kiloparsecs (9,500 light-years) from Earth. If placed at the center of the Solar System, its photosphere would at least engulf the orbit of Jupiter.

Image credit: Philip Park / CC BY-SA 3.0

September 03 2017

7046 8593 500
Reposted bypati2k6 pati2k6
7048 4c8d
Reposted bykentoquer kentoquer
7050 a13a 500

astronomyblog:

The Big Dipper

by: VegaStar Carpentier

Reposted bypati2k6 pati2k6

September 02 2017

7929 57a7

dvdp:

me, in a magnetic field and pulses of radio wave energy

7930 7e14 500

just–space:

NGC 4651: The Umbrella Galaxy

js
Reposted bybollabolla bollabolla
7931 0de6

mrdiv:

design_takes_time

7932 fd7a 500

just–space:

The Eye of God - An Infrared Image of the Helix Nebula. Have fun zooming this high resolution image.

js
Reposted bybollabollaMoblitzSanthe

July 30 2017

Why are things?

I don’t know why I still have this tumblr.

I don’t use tumblr as a social network, I have Twitter, Mastodon, Slack and even Facebook.

I don’t use tumblr for quick and short posts. See Twitter and Mastodon.

I don’t use it for longer posts. I have a blog for that.

I don’t post photos. If I do, I use instagram and Twitter. And/or Mastodon and/or Facebook. Whatever.

TL;DR Tumblr doesn’t fill any void for me, but oh well, I’ll just let this lie around here for a while.

Older posts are this way If this message doesn't go away, click anywhere on the page to continue loading posts.
Could not load more posts
Maybe Soup is currently being updated? I'll try again automatically in a few seconds...
Just a second, loading more posts...
You've reached the end.

Don't be the product, buy the product!

Schweinderl