Hacker News
- New jet engine enables efficiency at every speed for cheaper orbital launches https://twitter.com/k2pilot/status/1763007610993991722 137 comments
- Astronomers Have Found a Star Orbiting a Black Hole at 1% the Speed of Light https://www.sciencealert.com/astronomers-just-found-a-star-orbiting-a-black-hole-at-1-percent-the-speed-of-light 120 comments
- Elon Musk: [methane thrusters] "Cool, but an unnecessary complication for now. These are being removed to speed up time to orbital launch." https://twitter.com/elonmusk/status/1407969457411067905 80 comments spacex
- The FCC Wants to Speed Up The Roll Out of Internet From Low Earth Orbit https://www.cordcuttersnews.com/the-fcc-wants-to-speed-up-the-roll-out-of-low-earth-orbit-internet/ 4 comments space
- Gravity travels in waves at the speed of light, should orbital dynamic models take this into account? https://www.reddit.com/r/askscience/comments/6meyb4/gravity_travels_in_waves_at_the_speed_of_light/ 7 comments askscience
- Warp Drive Engaged: Star Discovered Orbiting Black Hole at 1 Percent Light Speed https://sputniknews.com/science/201703171051668391-star-black-hole-light-speed/ 12 comments space
- Astronomers Just Found a Star Orbiting a Black Hole at 1 Percent the Speed of Light https://www.sciencealert.com/astronomers-just-found-a-star-orbiting-a-black-hole-at-1-percent-the-speed-of-light 7 comments science
- Astronomers believe they found a star orbiting a black hole at 1% the speed of light https://www.sciencealert.com/astronomers-just-found-a-star-orbiting-a-black-hole-at-1-percent-the-speed-of-light 78 comments space
- Is the speed of the Earth's orbit around the Sun constant? What would happen if there was a change in the speed? https://www.reddit.com/r/askscience/comments/5gyijc/is_the_speed_of_the_earths_orbit_around_the_sun/ 14 comments askscience
- If the Moon is tidally-locked but its orbit is elliptical, doesn't the speed of the Moon's rotation have to change? https://www.reddit.com/r/askscience/comments/519ib4/if_the_moon_is_tidallylocked_but_its_orbit_is/ 5 comments askscience
- Is the orbit speed of the ISS around Earth constant? https://www.reddit.com/r/askscience/comments/4zi3vi/is_the_orbit_speed_of_the_iss_around_earth/ 4 comments askscience
- Does the mass of the planet affect the speed of its orbit? https://www.reddit.com/r/askscience/comments/4wbtc6/does_the_mass_of_the_planet_affect_the_speed_of/ 21 comments askscience
- Firefly Space Systems charges full-speed toward low Earth orbit http://arstechnica.com/science/2014/11/firefly-space-systems-charges-full-speed-toward-low-earth-orbit/ 11 comments spacex
- Firefly Space Systems charges full-speed toward low Earth orbit http://arstechnica.com/science/2014/11/firefly-space-systems-charges-full-speed-toward-low-earth-orbit/ 5 comments technology
- What If: Orbital Speed http://what-if.xkcd.com/58/ 78 comments space
- Stars reduce time to act, timebank and number of orbits you can sit out in cash games to speed up the game https://www.pokerstrategy.com/news/world-of-poker/PokerStars-reduce-time-to-act-in-cash-games_105016/ 3 comments poker
- How does a spacecraft Measure its speed in orbit around a planet? https://www.reddit.com/r/askscience/comments/6f0bxs/how_does_a_spacecraft_measure_its_speed_in_orbit/ 11 comments askscience
- If gravity propagates at the speed of light does that mean the Earth is geometrically "off" it's position by 8 minutes times our orbital velocity? https://www.reddit.com/r/askscience/comments/5fu0o5/if_gravity_propagates_at_the_speed_of_light_does/ 10 comments askscience
- Can SpaceX's rockets travel faster than the speed Earth orbits the Sun? https://www.reddit.com/r/askscience/comments/4m7okt/can_spacexs_rockets_travel_faster_than_the_speed/ 25 comments askscience
- Fast Broadband From Orbit? New Data Says SpaceX Can Do It - SpaceX just hit the FCC's goal for low internet lag. Next step: 1 gigabit internet speeds. https://www.fool.com/investing/2020/08/23/fast-broadband-from-orbit-new-data-says-spacex-can/ 9 comments technology
- Astronomers make most detailed observations to date of material orbiting close to a black hole, confirming its existence at the center of the Milky Way. "It's mind-boggling to actually witness material orbiting a massive black hole at 30% of the speed of light." said one of the researchers. https://www.eso.org/public/news/eso1835/ 18 comments science
- Observations of Their Orbits and Chemical Compositions Pin Down the Likely Origins of Six Stars that Move at Unusually High Speeds http://jkas.kas.org/journals/2019v52n3/v52n3p057_lee.pdf 2 comments science
- Is it possible for something travelling at the speed of light, such as photons, to orbit a body, like a black hole for example? https://www.reddit.com/r/askscience/comments/6pa37a/is_it_possible_for_something_travelling_at_the/ 12 comments askscience
- Does the error in the prediction of orbital speeds (Galaxy rotation curve) apply to all orbits, even in our solar system? https://www.reddit.com/r/askscience/comments/g3yta6/does_the_error_in_the_prediction_of_orbital/ 7 comments askscience
- The star S62 orbits the Milky Way's central black hole. Its orbit was recently measured, and found to reach 7% of the speed of light (76 million km/h), making it by far the fastest known star. https://en.wikipedia.org/wiki/Sagittarius_A*#Orbiting_stars 4 comments space
- If there was a planet orbiting at the exact same speed as the Earth, in the same orbital path, but on the other side of the sun from the Earth, would we know about it by now? How would we figure that out? https://www.reddit.com/r/askscience/comments/6vrxjn/if_there_was_a_planet_orbiting_at_the_exact_same/ 27 comments askscience
- SpaceX says more Starlink orbits will speed service, reduce launch needs https://spacenews.com/spacex-says-more-starlink-orbits-will-speed-service-reduce-launch-needs/ 4 comments technology
- SpaceX says more Starlink orbits will speed service, reduce launch needs https://spacenews.com/spacex-says-more-starlink-orbits-will-speed-service-reduce-launch-needs/ 4 comments space
- The Parker Solar Probe, designated to lift off at 3:53 a.m. EDT, will be on its 7 years long mission to become the fastest-ever human-made object with an estimated speed of 430,000 miles per hour in its final orbits. https://www.nasa.gov/content/goddard/parker-solar-probe 66 comments space
- Do the orbital periods of the planets and other known bodies in our solar system change? If so, do they speed up or slow down? https://www.reddit.com/r/askscience/comments/7upawx/do_the_orbital_periods_of_the_planets_and_other/ 6 comments askscience
- Imaging ever closer to the event horizon - Two new papers probe the matter in an area that includes some of the closest stable orbits to the black hole. One paper shows that a supermassive black hole is spinning so fast that a location on its surface would move at roughly half the speed of light. https://arstechnica.com/science/2019/01/imaging-ever-closer-to-the-event-horizon/ 3 comments science
- SpaceX on Twitter: “Falcon 9 has completed 31 missions so far this year, delivering ~351 metric tons to orbit – carrying astronauts & research to the @space_station, deploying Starlink to provide global high-speed internet, as well as many other critical payloads for our commercial & gov customers” https://twitter.com/spacex/status/1549078643673927683?s=21&t=EqgvGyjU7SZXU8oLjvBsQw 98 comments spacex
- A newly discovered star only takes four years to travel around the black hole at the centre of our galaxy. The star, S4716, orbits Sagittarius A*, the black hole in the centre of our Milky Way, in four years and reaches a speed of around 8000 kilometres per second. https://portal.uni-koeln.de/en/universitaet/aktuell/press-releases/single-news/8000-kilometres-per-second-star-with-the-shortest-orbital-period-around-black-hole-discovered 61 comments science
- China Reveals Wind Tunnel Tests Of Space Plane Launching High Speed Mothership Aircraft. Such a system would give China the ability to rapidly and unpredictably access space with a reusable orbiter https://www.thedrive.com/the-war-zone/30531/china-reveals-wind-tunnel-tests-of-space-plane-launching-high-speed-mothership-aircraft 17 comments space
- SpaceX says more Starlink orbits will speed service, reduce launch needs - SpaceNews.com https://spacenews.com/spacex-says-more-starlink-orbits-will-speed-service-reduce-launch-needs/ 243 comments spacex
- The UK is to provide £60m for a revolutionary new rocket engine that can send astronauts into orbit and accelerate aircraft to five times the speed of sound. http://m.guardian.co.uk/science/2013/jul/16/60m-space-rocket-engine 8 comments space
- Black hole found ripping apart a red dwarf that is orbiting at record-breaking speeds http://www.esa.int/our_activities/space_science/black_hole-star_pair_orbiting_at_dizzying_speed 678 comments science
- California-based startup, SpinLaunch, is developing an alternative rocket launch technology that spins a vacuum-sealed centrifuge at several times the speed of sound before releasing the payload, launching it like a catapult up into orbit https://interestingengineering.com/medieval-space-flight-a-company-is-catapulting-rockets-to-cut-costs 824 comments space
- China's Hybrid Spaceplane Could Reset The 21st Century Space Race - It takes off from a runway, flies at hypersonic speeds, then rockets into orbit http://www.popsci.com/chinas-hybrid-spaceplane-could-reset-21st-century-space-race 15 comments space
- There are hidden orbits in the solar system that can extremely shorten the flight times of asteroids and space probes. These arc-shaped “super highways” are created by gravity resonances of the large planets and form a kind of high-speed network, as physical simulations reveal. https://advances.sciencemag.org/content/6/48/eabd1313 15 comments science