The "Science and Space" Thread #2

ekim68

Mike
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Is dark matter real, or have we misunderstood gravity?


For many years now, astronomers and physicists have been in a conflict. Is the mysterious dark matter that we observe deep in the Universe real, or is what we see the result of subtle deviations from the laws of gravity as we know them? In 2016, Dutch physicist Erik Verlinde proposed a theory of the second kind: emergent gravity. New research, published in Astronomy & Astrophysics this week, pushes the limits of dark matter observations to the unknown outer regions of galaxies, and in doing so re-evaluates several dark matter models and alternative theories of gravity. Measurements of the gravity of 259,000 isolated galaxies show a very close relation between the contributions of dark matter and those of ordinary matter, as predicted in Verlinde's theory of emergent gravity and an alternative model called Modified Newtonian Dynamics. However, the results also appear to agree with a computer simulation of the Universe that assumes that dark matter is 'real stuff'.
 

ekim68

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Roll up, roll up! Get your tickets for the great space balloon ride


Cape Canaveral's Space Perspective has officially started selling tickets for the highest balloon ride of them all: a six-hour floating journey to the edge of space, where you can watch the sunrise. At US$125,000 a seat, flights start in 2024.

Your ride is the Spaceship Neptune, which we first heard about last year. It's a pressurized (and hopefully well heated) capsule hanging from an "advanced spaceballoon" the size of a football stadium – presumably something even larger than the Big 60 zero-pressure scientific balloon NASA launched in September 2018.
 

ekim68

Mike
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Boeing's Starliner capsule gears up for second attempt to reach ISS


An advanced spacecraft under development by Boeing is set to swing back into action, following a failed attempt to reach the International Space Station (ISS) in 2019. The Starliner capsule is undergoing final preparations ahead of a launch next week, which is hoped to demonstrate its ability to ferry astronauts to and from the orbiting laboratory ahead of crewed flights planned for later in the year.

cap.jpg
 

ekim68

Mike
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Oh yeah, about the laundry... :eek:


P & G and NASA team up to tackle astronauts' dirty space laundry


Procter & Gamble, through its Tide brand, is working with NASA to develop special detergents and washing machines to launder clothes in space. Under a Space Act Agreement, the company's Mission PGTide (P&G Telescience Investigation of Detergent Experiments) will test detergent and other cleaning products aboard the International Space Station (ISS) in 2022.

Doing the laundry is a chore that most people take for granted, but for astronauts in space it is an unheard of luxury.

 

ekim68

Mike
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Virgin Galactic receives FAA approval to carry passengers into space


Virgin Galactic has made history, becoming the first spaceliner to be certified by the US Federal Aviation Administration (FAA) to carry passengers on its spaceplanes. The adjustment of the operator’s license held by the company since 2016 comes as Virgin Galactic prepares for its last three test flights, including the first fully crewed test flight in the coming months.
 

ekim68

Mike
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Mars helicopter takes it to the limit with more groundbreaking flights

Where are you now, Mars Ingenuity helicopter? While it seems like the little chopper has been quiet, it turns out that Ingenuity has aced more of its flights -- and even got a software update to fix an annoying issue that impacted some of its previous outings.
The 4-pound helicopter has successfully flown eight times on Mars as of June 21, according to an update from Teddy Tzanetos, the helicopter operations lead at NASA's Jet Propulsion Laboratory in Pasadena, California.
 

ekim68

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And more on that...


Gravitational wave trifecta completed as black holes eat neutron stars


Detecting gravitational waves from collisions between two black holes or two neutron stars is becoming almost mundane, but now astronomers have detected the final piece of the trifecta – a black hole swallowing a neutron star. Two separate events rolled in just days apart, with the black holes gobbling up the stars like Pac-Man rather than Cookie Monster.

Gravitational waves are ripples in the very fabric of spacetime itself, caused by some of the most energetic cataclysms in the universe, such as collisions between massive objects like black holes and neutron stars. More than 50 of these events have been detected since the Nobel Prize-winning first detection in 2015.
 

ekim68

Mike
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57,708

ESA uses spacecraft "housekeeping" data to measure cosmic rays


By studying the logs of computer malfunctions caused by high-energy particles striking their circuitry, ESA scientists have used "housekeeping" data from the Rosetta and Mars Express deep-space probes to shed new light on cosmic rays in the solar system.

The Earth is constantly being bombarded by high-energy particles popularly known as cosmic rays that are streaming in from the outside the solar system. We're not troubled by them on the surface because the Earth is protected by its atmosphere and magnetic field, but they can be a serious hazard to space missions, especially ones that travel beyond low-Earth orbit.

 

ekim68

Mike
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:cool:


NASA’s Self-Driving Perseverance Mars Rover ‘Takes the Wheel’


NASA’s newest six-wheeled robot on Mars, the Perseverance rover, is beginning an epic journey across a crater floor seeking signs of ancient life. That means the rover team is deeply engaged with planning navigation routes, drafting instructions to be beamed up, even donning special 3D glasses to help map their course.

But increasingly, the rover will take charge of the drive by itself, using a powerful auto-navigation system. Called AutoNav, this enhanced system makes 3D maps of the terrain ahead, identifies hazards, and plans a route around any obstacles without additional direction from controllers back on Earth.
 

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