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Tom Vassos
697 posts

Tom Vassos
@tomvassos
#Professor #Author #Speaker #CosmologistsWithoutBorders #Astronomy #Cosmology #SpaceExploration #AstronomyOnFire #CosmosOnTap #Futurist #Astrophysics
Toronto, Ontario Canada Katılım Şubat 2009
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On the Moon, tracks from rovers or astronauts could last for millions of years because of the lack of wind on the atmosphere-less body. But on Mars, winds are common. Within months, tracks left by rovers will likely be erased. @exploreplanets
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The Parker Solar Probe set a record this year for the highest speed reached by any human-made object. Its peak speed was 176 kilometers per second (more than 39,000 miles per hour, or 0.06 percent the speed of light) relative to the Sun. (via @exploreplanets)
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Many planetary missions have given humanity much more than we asked for. NASA’s Opportunity Mars rover, for example, was designed for a 90-day mission but operated for over 14 years before communication was lost in 2018. (via @exploreplanets)
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In 3.5 years, The Planetary Society’s LightSail 2 completed 18,000 orbits of the Earth and journeyed about 8 million kilometers (5 million miles) in total. (via @exploreplanets)
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Pairs of touching asteroids — called contact binaries — are thought to be common in the Solar System. But those observed in orbit around asteroid Dinkinesh are among the first seen up-close and are the only ones ever observed orbiting another asteroid. (via @exploreplanets)
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Perseverance has roved over 21 kilometers (13 miles) since it landed on Mars in 2021. But if there were a contest for long distance travel on another world, the champion would be Opportunity, which covered over 45 kilometers (28 miles) between 2004 and 2018. (via @exploreplanets)
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A star can come back from the dead if it steals the life force from another. In some very rare cases, a white dwarf (a dead star) will suck in material from a nearby star, getting massive enough to reignite. In other words, there are zombie vampire stars. (via @exploreplanets)
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Some moons didn’t start off as moons. Saturn’s Phoebe and Neptune’s Triton are both thought to have originated as Kuiper Belt Objects. Their orbits were likely disrupted, sending them into the inner Solar System to be captured by large planets’ gravity. (via @exploreplanets)
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In space, it would be better to drink a martini than a can of soda. Burping doesn't really work in microgravity, so carbonated drinks can cause major discomfort. With alcohol banned on the International Space Station, it's probably best to stick to water. (via @exploreplanets)
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Some of the Moon has actually been lost. NASA has gifted and loaned out hundreds of Moon rocks collected during the Apollo program. A 2011 report said 517 of these samples had been lost or misplaced. Many (but not all) have since been found. (via @exploreplanets)
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