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TOPIC: Solar System formation
Blobrana


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Scientists have measured the composition of oxygen at the birth of the Solar System.
The discovery is a vital piece of data for reconstructing the evolution of our cosmic neighbourhood.
Nasa's Genesis spacecraft spent more than two years collecting oxygen from the outermost layers of the Sun.
These layers reflect the composition of the gas and dust cloud, known as the solar nebula, from which the Solar System formed 4.6 billion years ago. The results were presented here at the 39th Lunar and Planetary Science Conference.

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Blobrana


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Dozens of undiscovered planets the size of Earth and larger could be lurking unseen in the dark outer reaches of the solar system, scientists say.
Astronomers believe there are large numbers of both rocky planets and gas giants in the Oort Cloud, a vast cloud of comets approximately five trillion miles away - some 50,000 times the distance from Earth to the Sun.

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Blobrana


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Whats the order of the planets in the solar system?
 Maybe the following mnemonic rings a bell: My Very Educated Mother Just Served Up Nine.
 Its useful for remembering the order of the planets today, but it wouldnt have been as useful in the past.
The reason this mnemonic wouldnt have worked is because the planets werent always in the order they are today. Four billion years ago, early in the solar systems evolution, Uranus and Neptune switched places.

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Blobrana


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Disk Formation in Collapsing Cloud



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Blobrana


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Interstellar shock waves
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 It turns out that our math teachers were right: being able to solve problems without a calculator does come in handy in the real world. Two theoretical physicists at Rensselaer Polytechnic Institute have used what they call pen-and-paper math to describe the motion of interstellar shock waves violent events associated with the birth of stars and planets.
The findings, published recently in the Monthly Notices of the Royal Astronomical Society, could provide astronomers with important information on the history of the solar system, the formation of stars, and the creation of chemicals that may have formed the basis for planets and even life on Earth.

Shock waves can teach us valuable information about the history of our solar system. If we can understand shock waves how they move, what leads to their formation, their temperature we can begin to understand where we came from and what our galaxy went through five billion years ago - Wayne Roberge, lead author and professor of physics, applied physics, and astronomy at Rensselaer.

The mathematical solution developed by Roberge and his colleague, adjunct professor Glenn Ciolek, reveals the force and movement of shock waves in plasma, the neutral and charged matter that makes up the dilute air of space. Unlike many previous studies of its kind, the researchers focused specifically on shock waves in plasma, which move matter in very different ways than the uncharged air on Earth.

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Blobrana


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Solar System formation
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Samples of the material picked up during the NASA Stardust mission indicate that parts of the comet Wild 2 actually formed in an area close to the sun.
New research by an international collaboration including Livermore researcher Saa Bajt analysed noble gases within Stardust samples. The helium and neon isotope analysis suggests that some of the Stardust grains match a special type of carbonaceous material found in meteorites; hence both must have spent time in the same gas reservoir, which was close to the sun.

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Blobrana


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Formation of the Solar System



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Blobrana


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Our Sun System - Size Of Planets and Stars to Scale



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Blobrana


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Quick: What's the order of the planets in the solar system? Need a little help? Maybe the following mnemonic rings a bell: "My Very Educated Mother Just Served Up Nine Pizzas." It's useful for remembering the order of the planets today, but it wouldn't have been as useful in the past, and not just because the International Astronomical Union demoted Pluto to "dwarf planet" last year. The reason this mnemonic wouldn't have worked is because the planets weren't always in the order they are today. Four billion years ago, early in the solar system's evolution, Uranus and Neptune switched places.

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Blobrana


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Title: Planetary Science Goals for the Spitzer Warm Era
Authors: Carey Lisse, Mark Sykes, David Trilling, Josh Emery, Yanga Fernandez, Heidi Hammel, Bidushi Bhattacharya, Erin Ryan, John Stansberry

The overarching goal of planetary astronomy is to deduce how the present collection of objects found in our Solar System were formed from the original material present in the proto-solar nebula. As over two hundred exo-planetary systems are now known, and multitudes more are expected, the Solar System represents the closest and best system which we can study, and the only one in which we can clearly resolve individual bodies other than planets. In this White Paper we demonstrate how to use Spitzer Space Telescope InfraRed Array Camera Channels 1 and 2 (3.6 and 4.5 um) imaging photometry with large dedicated surveys to advance our knowledge of Solar System formation and evolution. There are a number of vital, key projects to be pursued using dedicated large programs that have not been pursued during the five years of Spitzer cold operations. We present a number of the largest and most important projects here; more will certainly be proposed once the warm era has begun, including important observations of newly discovered objects.

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