Gateway to the Ring-Grazing Orbits: Cassini conducts new flybys of Titan and Enceladus

Cassini conducted its next-to-last flyby of Saturn’s moon Titan yesterday, in preparation of the Ring-Grazing Orbits has of its mission. Image Credit: NASA/JPL-Caltech
Cassini conducted its next-to-last flyby of Saturn’s moon Titan yesterday, in preparation of the Ring-Grazing Orbits has of its mission. Image Credit: NASA/JPL-Caltech

As reported earlier this week, the Cassini spacecraft is now preparing to make a series of very close passes by the edges of Saturn’s rings, known as Ring-Grazing Orbits. A couple days ago, Cassini conducted a close flyby of Saturn’s largest moon Titan; this is the second-to-last ever flyby of Titan before Cassini enters the Grand Finale phase of its mission, culminating in a deliberate plunge into Saturn’s atmosphere on Sept. 15, 2017. During this flyby, Cassini focused on mapping the surface and surface temperatures and used Titan’s gravity to help place the spacecraft into the Ring-Grazing Orbits.

Read MoreGateway to the Ring-Grazing Orbits: Cassini conducts new flybys of Titan and Enceladus

Cassini data may help locate ‘Planet Nine’ and reveals methane fog on Titan

Artist’s conception of the possible Planet Nine, orbiting much farther from the Sun than even Pluto. The Cassini spacecraft may be able to help find it. Image Credit: Caltech/R. Hurt (IPAC)
Artist’s conception of the possible Planet Nine, orbiting much farther from the Sun than even Pluto. The Cassini spacecraft may be able to help find it. Image Credit: Caltech/R. Hurt (IPAC)

The Cassini spacecraft has been orbiting Saturn for many years now, studying the massive planet and its moons in unprecedented detail. Now, Cassini might be able to help shed light on another Solar System mystery: the possible existence of a ninth planet in the outer Solar System far past Pluto, or “Planet Nine” as it has been dubbed. There is also a new report, based on old data, that the Huygens lander observed methane ground fog as it descended to the surface of Saturn’s moon Titan in 2005.

Read MoreCassini data may help locate ‘Planet Nine’ and reveals methane fog on Titan

Sinkholes on Titan: new study shows how hydrocarbon lakes may form by Earth-like erosion

Coloured mosaic of lakes near Titan’s north pole. Image Credit: NASA/JPL-Caltech/ASI/USGS
Coloured mosaic of lakes near Titan’s north pole. Image Credit: NASA/JPL-Caltech/ASI/USGS

Saturn’s largest moon, Titan, has seas and lakes of liquid methane and ethane dotting its surface, but one question scientists have been trying to figure out is how the hollows in the ground, which hold the lakes, form to begin with. Now, a new study offers a solution: The depressions in the surface are formed in a process similar to sinkholes on Earth.

Read MoreSinkholes on Titan: new study shows how hydrocarbon lakes may form by Earth-like erosion

‘Ocean Worlds Exploration Program’: new budget proposal calls for missions to Europa, Enceladus and Titan

Artist’s conception of Europa’s interior, with water rising through cracks in the surface, depositing salts similar to sea salt on Earth. The ocean below may be a habitable environment for some kind of life. Image Credit: NASA/JPL-Caltech
Artist’s conception of Europa’s interior, with water rising through cracks in the surface, depositing salts similar to sea salt on Earth. The ocean below may be a habitable environment for some kind of life. Image Credit: NASA/JPL-Caltech

The exploration of the outer Solar System has revealed a plethora of amazing worlds, the likes of which were little known or even unheard of just a decade ago. Among the most remarkable and tantalizing discoveries are the “ocean moons” such as Europa and Enceladus, which have oceans or seas of liquid water beneath their icy surfaces. Other moons like Titan, Ganymede, and Callisto may also have them, and even some asteroids. Titan also has seas and lakes of liquid methane/ethane on its surface. With all that water, these small worlds have become a primary focus in the search for possible life elsewhere in the Solar System. Now, a new NASA budget proposal wants to take that a step further and fund new missions to these watery moons.

Read More‘Ocean Worlds Exploration Program’: new budget proposal calls for missions to Europa, Enceladus and Titan

‘Life not as we know it’: new research shows how exotic biology may be possible on Titan

Illustration of methane rainfall and lake on Titan. New research suggests exotic forms of life could be possible in this alien environment. Image Credit: Mark Garlick (Space-art.co.uk)/APOD
Illustration of methane rainfall and lake on Titan. New research suggests exotic forms of life could be possible in this alien environment. Image Credit: Mark Garlick (Space-art.co.uk)/APOD

The search for life elsewhere has long focused on what we are most familiar with on Earth – in other words, “life as we know it,” or organisms which are carbon-based and require water to survive. However, a growing number of scientists are now thinking that alternative forms of life are possible, ones which have never been seen on Earth, but could flourish in other types of alien environments. A new study from Cornell University addresses this very question, demonstrating a form of microscopic life which would be possible on Saturn’s largest moon Titan.

Read More‘Life not as we know it’: new research shows how exotic biology may be possible on Titan