MESSENGER Spacecraft 

Horns by Michal Kváč https://ift.tt/2zvtNZ1

Hey Tumblr!

I have started a new blog to share the joys of fishing and kayaking! This post is all about the best cheap kayaks for under 200 dollars. I hope some of you who are interested can find more about kayaking and fishing! Either way, it’s worth a read if you have a minute. It might just save you a few hundred dollars down the road.

Read my blog at Get Fishing Equipment

If Mars were Terraformed (tablet) Click the image to download the correct size for your tablet in high resolution

Triangulum Log - Blue Veil System - Post 3 (Lunar Skies)

Many of the system’s gas giants have large satellites with significant atmosphere’s. Here are some of the best views of the skies of these moons.

High Resolution Pics

Image 1 - The Great Eye in the sky

Image 2 - Double Sunset

Image 3 - Lunar Desert

Image 4 - Tranquility

Image 5 - Cold Distant Giant

Split Moon. –outerspaceclothing.com–

Earth-Like World

Picture of the Day 2 - October 16, 2018

Here I come across the most Earth-like planet to date. The planet is covered in green vegetation, blue oceans and ice caps at the poles. This planet is located near the galactic core; therefore, the sky is full of bright stars, even more so than globular clusters.

We really do have some weird moons in our solar system!

I know there’s a lot of tension after Tumblr’s new policy annouced for December 17th, but reblog this if you aren’t leaving Tumblr so that other blogs can know they aren’t going to be completely alone!

Oculus System - Post 2 (Inner-most Planet)

The inner-most planet is a Chthonian Planet, or the core remnant of a large Ice of Gas Giant that lost its atmosphere to the solar winds. The planet is a Super-Earth mass world of 8.4 Earth Masses and a radius of 1.56 Earth’s or 9,954 kilometers in radius. The planet is extremely dense, being made almost entirely out of compressed metals with a thin silicate crust. It has an average density of 12.1 g/cm³. The surface experiences a gravitational force of 3.44 g.

This world has a water-vapor atmosphere that generates a powerful greenhouse effect on the surface. Surface temperatures reach 1,623 °F, and sodium and potassium clouds circle the planet. Pressure on the surface is so extreme, the atmosphere exists as a super-critical fluid, with an atmospheric pressure 6,511 times that of Earth. The atmosphere reflects enough sunlight that the day-side has a bright-white color that drowns out the glowing clouds.

High Resolution Pictures

Picture 1 - Inner-Hell

Picture 2 - Tiny Moon

Picture 3 - Glowing Storms

Picture 4 - Steamy Atmosphere

Dust Storms on Titan Spotted for the First Time

Data from NASA’s Cassini spacecraft has revealed what appear to be giant dust storms in equatorial regions of Saturn’s moon Titan. The discovery, described in a paper published on Sept. 24 in Nature Geoscience, makes Titan the third Solar System body, in addition to Earth and Mars, where dust storms have been observed.

The observation is helping scientists to better understand the fascinating and dynamic environment of Saturn’s largest moon.

“Titan is a very active moon,” said Sebastien Rodriguez, an astronomer at the Université Paris Diderot, France, and the paper’s lead author. “We already know that about its geology and exotic hydrocarbon cycle. Now we can add another analogy with Earth and Mars: the active dust cycle, in which organic dust can be raised from large dune fields around Titan’s equator.”

Titan is an intriguing world – in ways quite similar to Earth. In fact, it is the only moon in the Solar System with a substantial atmosphere and the only celestial body other than our planet where stable bodies of surface liquid are known to still exist.

There is one big difference, though: On Earth such rivers, lakes and seas are filled with water, while on Titan it is primarily methane and ethane that flows through these liquid reservoirs. In this unique cycle, the hydrocarbon molecules evaporate, condense into clouds and rain back onto the ground.

The weather on Titan varies from season to season as well, just as it does on Earth. In particular, around the equinox – the time when the Sun crosses Titan’s equator – massive clouds can form in tropical regions and cause powerful methane storms. Cassini observed such storms during several of its Titan flybys.

When Rodriguez and his team first spotted three unusual equatorial brightenings in infrared images taken by Cassini around the moon’s 2009 northern equinox, they thought they might be the same kind of methane clouds; however, an investigation revealed they were something completely different.

“From what we know about cloud formation on Titan, we can say that such methane clouds in this area and in this time of the year are not physically possible,” said Rodriguez. “The convective methane clouds that can develop in this area and during this period of time would contain huge droplets and must be at a very high altitude – much higher than the 6 miles (10 kilometers) that modeling tells us the new features are located.”

The researchers were also able to rule out that the features were actually on the surface of Titan in the form of frozen methane rain or icy lavas. Such surface spots would have a different chemical signature and would remain visible for much longer than the bright features in this study, which were visible for only 11 hours to five weeks.

In addition, modeling showed that the features must be atmospheric but still close to the surface – most likely forming a very thin layer of tiny solid organic particles. Since they were located right over the dune fields around Titan’s equator, the only remaining explanation was that the spots were actually clouds of dust raised from the dunes.

Organic dust is formed when organic molecules, formed from the interaction of sunlight with methane, grow large enough to fall to the surface. Rodriguez said that while this is the first-ever observation of a dust storm on Titan, the finding is not surprising.

“We believe that the Huygens Probe, which landed on the surface of Titan in January 2005, raised a small amount of organic dust upon arrival due to its powerful aerodynamic wake,” said Rodriguez. “But what we spotted here with Cassini is at a much larger scale. The near-surface wind speeds required to raise such an amount of dust as we see in these dust storms would have to be very strong – about five times as strong as the average wind speeds estimated by the Huygens measurements near the surface and with climate models.”

The existence of such strong winds generating massive dust storms implies that the underlying sand can be set in motion, too, and that the giant dunes covering Titan’s equatorial regions are still active and continually changing.

The winds could be transporting the dust raised from the dunes across large distances, contributing to the global cycle of organic dust on Titan and causing similar effects to those that can be observed on Earth and Mars. source

Inside - Vadim Sadovski