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In Depth | What is an Exoplanet? – Exoplanet Exploration: Planets Beyond our Solar System
Most of the exoplanets discovered so far are in a relatively small region of our galaxy, the Milky Way. ("Small" meaning within thousands of light-years of our solar system; one light-year equals 5.88 trillion miles, or 9.46 trillion kilometers.) That is as far as current telescopes have been able to probe. We know from NASA’s Kepler Space Telescope that there are more planets than stars in the galaxy.
Although exoplanets are far – even the closest known exoplanet to Earth, Proxima Centauri b , is still about 4 light-years away – scientists have discovered creative ways to spot these seemingly tiny objects.
Three-Wheeled Turret Car Looks Like It Should Be Orbiting Thunderdome | Hackaday
In a post-apocalyptic world, this is the hacker you want rebuilding society. He’s showing off a three-wheeled go-kart that pivots the cockpit as it steers . A hand crank mounted at the center of the vehicle pivots each of the three wheels in place, but keeps the driver facing forwards with a matching rotation. Hit up the video after the break to see it for yourself.
This is a pretty good closeup of one of the wheel assemblies. First question is how does the turning mechanism work? Since all three wheels and hub are smoothly coordinated it’s likely this is a planetary gearing setup where the inner ring has teeth that turn the rings around the tires themselves. However, we can see a spring suspension system which makes us doubt the lower ring surrounding the tire would stay engaged with a planetary gear. What do you think?
How We Find and Characterize | Discovery – Exoplanet Exploration: Planets Beyond our Solar System
A statistical estimate based on data from NASA’s Kepler Space Telescope revealed that there are more planets than stars in our galaxy. That means there are more than a trillion planets in our galaxy alone, many of them in Earth’s size range.
“Right now we know, for the first time, that small planets are very common,” said Sara Seager, a professor at the Massachusetts Institute of Technology and an exoplanet research pioneer. “It’s phenomenal. We had no way to know that before Kepler. We’ll just say, colloquially: They’re everywhere.”
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How astronomers are searching for exoplanets using 4 simple variables | Astronomy.com
Exoplanets – worlds around other stars – have long been staples of science fiction but remained mostly inaccessible to scientific investigations. This all changed over the past decade, when NASA’s Kepler and TESS exoplanet hunter space telescopes added thousands of new planets to the previously short tally of alien worlds.
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Although planets are likely to be closer to their host stars, they cannot all be jammed together. Planets all attract each other via gravity, which is much stronger when the planets are closer. Thus, planets that are too close will distort each others orbits, often leading to chaotic interactions and even the ejection of one of the planets from their birth systems.
SpaceX, NASA plan astronaut launch to ISS this weekend | Fortune
Asteroid Ryugu: The spinning space rock visited by Hayabusa2 | Space
The asteroid's name means "dragon palace" in Japanese and refers to a magical underwater castle in a Japanese folktale. In the story, a fisherman visits the palace and returns with a mysterious box, much like the mysterious samples Hayabusa2 will be bringing back to Earth. The small asteroid's features , such as its craters and rocks, are all named for fairytales from around the world.
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Researchers can gain insight into our solar system 's genesis by studying asteroids like Ryugu, as these space rocks are essentially large chunks of debris leftover from the solar system's formation. Ryugu is classified as a carbonaceous, or C-type asteroid, which means it contains a lot of carbon and water. Previous research suggests C-type asteroids are relics of the early solar system that hold primordial material from the nebula that gave birth to the sun and its planets.
Rocket booster since 1966 returns to Earth orbit and orbits our planet 'for a few weeks'
During a 1966 mission to the moon, a rocket booster flew through the abyss of space, caught by the Earth’s gravity and orbited our planet for ‘a few weeks’.
NASA launched the Unmanned Surveyor 2 probe to the moon in 1966, but the spacecraft lost control in mid-flight and NASA eventually lost contact.
Now Centaur, the upper-level rocket booster that helped lift the worst spacecraft out of Earth has been captured by our planet from orbit around the sun.
Happening on Twitter
"This is 5 times faster than the fastest prior vaccine development in history."—@realDonaldTrump GOP Fri Nov 13 21:53:01 +0000 2020
The average development timeline for a vaccine can take 8-12 years. Through Operation Warp Speed, we're doing it i… https://t.co/S7wGDYHvRN WhiteHouse (from Washington, D.C.) Fri Nov 13 22:06:06 +0000 2020
Just to be clear, Pfizer is part of Operation Warp Speed for production and delivery *only* which has not happened… https://t.co/KGNDgE2Uw5 AlexMLeo (from Washington, DC) Fri Nov 13 21:43:47 +0000 2020
In months of reporting about the race for the vaccine, Operation Warp Speed was barely a mention. Trump was NOT see… https://t.co/rmuQKFm7vK RichardEngel Fri Nov 13 21:29:56 +0000 2020
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