So far, we have only visited the planet once, with the Voyager 2 spacecraft back in And unlike Saturn, Jupiter and Neptune, which have horizontal sets of rings around them, Uranus has vertical rings and moons that orbit around its tilted equator. Scientists therefore suspect that Uranus was once similar to the other planets in the solar system but was suddenly flipped over. So what happened? Our new research, published in the Astrophysical Journal and presented at a meeting of the American Geophysical Union, offers a clue.
This month marks 6 years of Planet Four. In other words, they do a good job at sorting out the images which have a fan or blotch, from those that have Ls models planet fans Ls models planet blotches at plwnet. Welcome This is the blog for the online citizen science project Planet Four. Full res PDF. Hours Open Today! Thank you for all of your help and contributions.
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Hubble Telescope Reveals Super-Planets Covered in Alien Clouds | Space
So far, we have only visited the planet once, with the Voyager 2 spacecraft back in And unlike Saturn, Jupiter and Neptune, which have horizontal sets of rings around them, Uranus has vertical rings and moons that orbit around its tilted equator. Scientists therefore suspect that Uranus was once similar to the other planets in the solar system but was suddenly flipped over. So what happened?
Our new research, published in the Astrophysical Journal and presented at a meeting of the American Geophysical Union, offers a clue. We set out to uncover how it could have happened. Instead, we ran computer models simulating the events using a powerful supercomputer as the next best thing.
The basic idea was to model the colliding planets with millions of particles in the computer, each representing a lump of planetary material. We give the simulation the equations that describe how physics like gravity and material pressure work, so it can calculate how the particles evolve with time as they crash into each other.
Another benefit of using computer simulations is that we have full control. We can test a wide variety of different impact scenarios and explore the range of possible outcomes. Our simulations see above show that a body at least twice as massive as the Earth could readily create the strange spin Uranus has today by slamming into and merging with a young planet.
This could inhibit the mixing of material inside Uranus, trapping the heat from its formation deep inside. Thermal evolution is very complicated, but it is at least clear how a giant impact can reshape a planet both inside and out. The research is also exciting from a computational perspective. Much like the size of a telescope, the number of particles in a simulation limits what we can resolve and study. As well as making for some stunning pictures and animations of how the giant impact happened, this opens up all sorts of new science questions we can now begin to tackle.
These are basically lots of normal computers linked up together. So, running a big simulation quickly relies on dividing up the calculations between all parts of the supercomputer.
SWIFT estimates how long each computing task in the simulation will take and tries to carefully share the work evenly for maximum efficiency. Just like a big new telescope, this jump to 1, times higher resolution reveals details we have never seen before. So everything we learn about the possible evolution of our own ice giants feeds in to our understanding of their far distant cousins and the evolution of potentially habitable worlds. One exciting detail we studied that is very relevant to the question of extraterrestrial life is the fate of an atmosphere after a giant impact.
Our high resolution simulations reveal that some of the atmosphere that survives the initial collision can still be removed by the subsequent violent bulging of the planet. The lack of an atmosphere makes a planet a lot less likely to host life. Then again, perhaps the massive energy input and added material might help create useful chemicals for life as well.
Lots of questions remain about Uranus, and giant impacts in general. I would very much like to see that happen. The combination of observations, theoretical models and computer simulations will ultimately help us understand not only Uranus, but the myriad planets that fill our universe and how they came to be.
Jacob Kegerreis , Durham University. Super computations The research is also exciting from a computational perspective. Uranus seen by Voyager 2. Solar system Supercomputer Uranus Computer simulations. Enregistrez-vous maintenant.