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- What did we learn when our spacecraft visited the Rosetta Comet?
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- The comet was 67P Churyumov-Gerasimenko, hereafter referred to as the “ comet”.
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- The jets and tail emitted form the comet contain water, oxygen, carbon monoxide and carbon dioxide. The dust contains many different organic molecules.
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- This all reinforces the theory that it was comets that seeded the ingredients for life on Earth.
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- The density of the comet was 0.5 g/cm^3 which is half the density of water , 1.0 g/cm^3, indicating that the comet is 75% empty space.
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- One mystery is that the water on the comet has more neutrinos than water on Earth. A different isotope of H2O suggesting our water had different origins.
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- The spacecraft lander, named Philae, made a soft landing on the surface of the comet on November, 2014.
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- The comet has no magnetic field.
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- The temperature dropped to -240F.
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- The comet has a 6.44 year orbit around the Sun.
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- The comet shaped like a rubber duck with the body the size of 2.5 to 2.1 by 1.1 miles and the head the size of 1.6 to 1.4 by 1.1 miles.
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- The reflectivity of the comets surface is only 6%, which is about half that of our Moon.
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- The composition appears to be a mix of dust grains, organic compounds, and water ice cemented together. Despite the comet’s weak gravity it still has the power to hold all this debris together.
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- Water ice was discovered in more than 100 patches on the comet’s surface.
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- The Rosetta mission continues until September 2016. The comet was closest to the Sun August 13, 2015. It is now heading back out to beyond the orbit of Jupiter.
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- The 16 organic compounds discovered on the comet all represent precursors for biology. The formaldehyde is key to producing ribose which is key to producing RNA.
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-You may not be able to read this review if it were not for comets smacking the Earth a billion years ago.
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- How lucky can you get?
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- Other reviews available upon request. A typical comment is included taken from each review.
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- #1707 - December, 2014. A dirty snowball 4.6 billion years old. Calculates the density of several moons and planets.
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- #1696 - How much ice landed on the surface of Earth over 400,000,000 years ago. The water on Earth’s oceans totals 1.33 billion kilometers ^3.
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- #1692 - Rosetta Mission lands on the Comet. How mass is calculated to be 2.8 billion tons.
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- #1688 - November 12, 2014 Rosetta lands on a comet.
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- #1623 - Math calculations for the water loss as the comet loops around the Sun, 76,646,000 tons.
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- #1612 - How many comets have made close flybys to Earth? 60 comets were discovered in 2012. Seven came within 31,000,000 miles of impact. 60 new comets were discovered in 2012. 7 were close encounters.
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- #1600 - Comet ISON November 2013. Nothing in the Universe disappears, it just changes forms.
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- #1338 - Did comets bring water to Earth?
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- #1292 - Calculus used to measure the mass of the comet.
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- # There is more ….
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