Rosettas Comet Looks The Way It Is Due To Stress

Comet 67P/Churyumov–Gerasimenko, the object visited by the European Space Agency’s (ESA) Rosetta probe, is literally being sculpted by stress. The latest analysis has shown that the independent motions of the two lobes of the comet are creating wide fissures that are changing the shape of the comet and might even lead to a break-up.

Comet 67P is believed to have formed in the outer regions of the Solar System by the collision of two primordial objects. As the comet moved inward, the two lobes become more active. Due to gravitational interaction and pressure on the material that makes up the comet, cracks have begun to appear around the neck region and extend out globally.  

The evidence collected by the team suggests another important fact about the comet. The researchers weren’t sure if this was going to be the case, but given the depth of the fissures, it’s likely the interior of 67P is brittle. Their findings will be published in an upcoming paper. 

“We found networks of faults and fractures penetrating 500 metres underground, and stretching out for hundreds of metres,” lead author Christophe Matonti of Aix-Marseille University, said in a statement. “These geological features were created by shear stress, a mechanical force often seen at play in earthquakes or glaciers on Earth and other terrestrial planets, when two bodies or blocks push and move along one another in different directions. This is hugely exciting: it reveals much about the comet’s shape, internal structure, and how it has changed and evolved over time.”

The work used detailed high-resolution images taken by Rosetta’s OSIRIS camera, which is capable of seeing the comet in visible light and infrared, as well as analyzing the composition of the comet as well. The team then used stress modeling and organized the images in a three-dimensional analysis.

Recommended For You

Store Buildr - The Scrapbooking Resource

The Ultimate ‘Done For You’ Niche Website Store!

Trafficzing Basic

Turn Any Image into Clicks

Funnel360 Template Cub

Our Exclusive Template Club Will Help You 10X Your Mobile App Business Profits With SO Many Stunning Page, Video and Graphic Templates, PLUS A Fresh Set Of NEW Templates each month To Help You Crush Any Niche

Repwarn Resellers Account ANNUAL Option

Repwarn Keyword monitoring will scour the internet and social media - alreting you to any incidence of your keywords being triggered

“It’s as if the material in each hemisphere is pulling and moving apart, contorting the middle part – the neck – and thinning it via the resulting mechanical erosion,” explained co-author Olivier Groussin, also at Aix-Marseille University. “We think this effect originally came about because of the comet’s rotation combined with its initial asymmetric shape. A torque formed where the neck and ‘head’ meet as these protruding elements twist around the comet’s centre of gravity.”

The evolution of 67P over 4.5 billion years. C. Matonti et al (2019)

As 67P came to rest between the orbit of Mars and Jupiter, it got close enough to the Sun that it began sublimating – the transition of a substance from solid to gas, in this case, ice into vapor – and over tens of thousands of years, became what we see today.

Rosetta studied the comet for over two years, from July 2014. It eventually crash landed on the comet when it ran out of fuel on September 30, 2016.

Original Article : HERE ; This post was curated & posted using : RealSpecific

Thank you for taking the time to read our article.

If you enjoyed our content, we'd really appreciate some "love" with a share or two.

And ... Don't forget to have fun!


IM Checklist Volume 8: Messenger Marketing

IM Checklist Volume 8: Messenger Marketing - 18 Step by Step Checklists covering everything you need to know about Messenger Marketing and Messenger Bots


Ultimate Affiliate Promotion, Review and Bonus Page Builder

Leave a Reply