- 2939 - ASTEROID - sample return? - Japan’s Hayabusa 2 probe zoomed past Earth on December 5th and dropped off a capsule containing bits of an asteroid, finishing a six-year round trip to an asteroid
------------------ 2939 - ASTEROID - sample return?
- The mission is far from over: While Hayabusa 2’s parachute-equipped sample capsule descended to the Australian Outback, its mothership set a new course for an encounter with yet another asteroid in 2031.
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- Hayabusa 2’s prime objective was to deliver bits of Ryugu, an asteroid that’s currently 7,208,000 miles from Earth. Mission controllers at the Japan Aerospace Exploration Agency, or JAXA, cheered and laughed when word came that the capsule had survived atmospheric re-entry.
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- Imagery captured by tracking cameras and from the International Space Station showed the capsule streaking like a fireball across the sky as it decelerated from an initial speed of 26,700 per hour.
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- Searchers headed out by helicopter to track down the 40-centimeter-wide capsule in South Australia’s Woomera Test Range. The capsule was located within a couple of hours.
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- The sample is expected to amount to no more than a few grams, but it’ll be intensely studied at labs in Japan and the U.S. to tease out new insights about carbonaceous asteroids which are thought to have been the starting stuff of planets and may contain the chemical building blocks of life.
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- Hayabusa 2’s predecessor, the original Hayabusa probe, sampled a different sort of asteroid named Itokawa back in 2005. Hayabusa 1’s return trip was fraught with difficulties, including propulsion and communication problems that resulted in delaying the sample delivery until 2010. About 1,500 grains of asteroid dust were recovered.
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- This time, the mission went much more smoothly. Four years after its launch in 2014, Hayabusa 2 made its appointed rendezvous with asteroid Ryugu, sent a set of mini-rovers to the surface for reconnaissance and collected bits of rock and dust.
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- The probe began the homeward trip a little more than a year ago, and encountered no trouble along the way. Hours in advance of the scheduled delivery, the Hayabusa 2 mothership released the sample capsule on its target trajectory and then pulled up to head toward deep space again.
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- Thanks to that maneuver, Hayabusa 2 is on track to rendezvous with a water-rich asteroid known as 1998 KY26 in 2031. This asteroid is much smaller than Ryugu, 30 meters wide, as opposed to 900 meters wide for Ryugu. It also spins on its axis every 10 minutes or so.
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- We won’t have to wait 11 years for the next asteroid sample to arrive: NASA’s OSIRIS-REx spacecraft snagged as much as 2 kilograms of material from the asteroid Bennu in October, 2020, and is due to drop its sample capsule down to a desert test range in Utah during a 2023 flyby.
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- 2916 - ASTEROID - near miss? Many nearby stars will pass close to the Oort Cloud at the outskirts of our Solar System, but only one will move through it. In about 1.35 million years, Gliese 710 likely will gravitationally perturb millions of comets, sending a sizable number on a potential collision course with Earth.
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- 2910 - ASTEROID - mining gold from asteroids? “16 Psyche” is an asteroid full of metal in the asteroid belt that could be worth $700 quintillion.. NASA plans to visit 16 Psyche by 2026. Could we be commercial mining faraway asteroids or should we start with the moon?
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- 2722 - SPACETIME - at the macro and micro levels.? How Can Space and Time be Related?. Space and time seem to be absolute quantities to us. It is hard to see their interrelationship until you take their ratio as velocity and extend that ratio to its limits. Velocity is space / time!
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- 2627 - ASTEROID - to hit Mother Earth. It is not an if, it is a when. Astronomers are tracking Near Earth Asteroids, NEAs. There are many, and each one needs to be identified with an orbit trajectory to learn if it will be a threat. OK, let’s just say they see one coming right at us. What then?
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- 2595 - ASTEROID - Teacher’s Lesson Plan. The fastest spinning asteroid was discovered by an amateur astronomer, but using a professional telescope by remote control. This just became available to all teachers who want to teach some astronomy using the internet.
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- 2332 - Asteroids, comets, and meteors are ice balls and rocks orbiting the Sun just like our planet. What we call these objects all depends on where the debris was formed in the accretion disk that rotated around the Sun when the planets were formed.
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- 2323 -
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- 2314 - On December 18, 2018, an asteroid barreled through the atmosphere at a speed of 72,000 miles per hour , on a steep trajectory of seven degrees. Measuring several meters in size, the space rock exploded 16 miles above the Earth's surface, with an impact energy of 173 kilotons.
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- 2296 - Asteroids are small, airless rocky worlds revolving around the sun that are too small to be called planets. They are also known as planetoids or minor planets. In total, the mass of all the asteroids is less than that of Earth's moon. But despite their size, asteroids can be dangerous.
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- 2250 - Asteroids visits and impacts. We have several spacecrafts visiting asteroids right now. January, 2019. This Review will summarize the current visits and then get into the history even some that are evident on the Earth and on the Moon.
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- 2226 Asteroid Ryugu. Spacecraft landed on the surface on September 2018. What have we learned? The Japanese spacecraft is studying the asteroid named Ryugu. After over a 3 year journey the spacecraft has released rovers to the surface to make measurements. For the next 18 months, the spacecraft will probe, poke, prod and impact the asteroid, deploying the small lander and three rovers to hop along the surface.
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- 2209 Asteroid Oumuamua from another solar system. If Oumuamua came from an extrasolar planetary system like our solar system, it is much more likely to have begun its journey as a comet. The ejection of an asteroid from an extrasolar system is much less likely and could involve a violent event such as the explosion of a star.
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- 2203 Asteroid Bennu. Arrived December 2019 and will inspect every square inch of the asteroid before returning home in 2023.
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- 2044 - Oumuamua is a needle shaped asteroid that will exit solar system. This Review lists 15 other reviews about asteroids.
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- 1924 - Visitors from outer space. Asteroids and supernovae affect life on Earth. Detective work is looking at the evidence. Did the asteroid that struck the Yucatan Peninsula kill off the dinosaurs? Did supernova 1987 affect life on Earth?
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- 1923 - In 2017 50 asteroids passed us at a distance closer than our Moon. When will a big asteroid hit the Earth? What is the mission that will land a spacecraft on an asteroid and bring back a sample of its surface? This mission to also to determine the likelihood of it impacting Earth. It comes by every 6 years.
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- 1871 - Asteroids and their Trojan orbits. In order to predict asteroids trajectories we need to learn about their composition. Missions will soon visit two asteroids to learn more. Maybe, where life originated.
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- 1829 - Dwarf planets and asteroids. Not the 8 planets in our Solar System ,but, the Dwarf Planets , asteroids, and comets that have had the most impact on the evolution of life on Earth.
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- 1825 - Asteroids responsible for evolution on Earth? How many times has Earth been hit by a large asteroid? What is the likelihood of another hit? What is Congress and NASA doing about this potential danger? The math to calculate the energy of an impact.
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- 1769 - When is the next asteroid going to hit Earth? How many are near Earth objects intersecting our orbit around the Sun? How big are they? What can we do about an imminent impact?
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- 1580 - Asteroids the bricks that built the Solar System. In 2013 there were 551,621 registered asteroids. Ceres is the biggest at 620 miles in diameter.
- 1554 - Asteroids and meteorites are fossils with stories.
- 1429 - There is an asteroid heading right towards us.
- 1375 - There is an asteroid following us. Earth and the asteroid share the same orbit around the Sun.
- 1193 - About the Chicxulub Crater in the Yucatan, Mexico.
- 1309 - Vesta and Ceres get a visitor, the Dawn spacecraft.
- 1296 - When an asteroid hit Manson, Iowa.
- 1265 - This asteroid missed us, but , what if? June 27, 2011.
- 1315 - How do asteroids and planets evolve?
- 1193 - Asteroid to hit mother Earth? About the Chicxulub Crater in the Yucatan, Mexico.
- 937 - Spinning Asteroid, teacher’s lesson plan. “Spinning Asteroid - A t Teacher’s Lesson Plan”. How student can use the Faulkes Telescope to do astronomy 24-7 (faulkestelescope.com/education)
- 913 - Apophis and killer asteroids
- 660 - Asteroids, Comets and Russian Rouulette.
- 635 - Asteroid Apophis arrived April 17, 2006
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- December 16, 2020 ASTEROID - sample return 2938
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--------------------- --- Wednesday, December 16, 2020 ---------------------------
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