Anonymous ID: 9dcc49 May 18, 2023, 3:57 p.m. No.18868554   🗄️.is 🔗kun   >>8658 >>8837 >>9069 >>9173 >>9245

China launches BeiDou navigation satellite to orbit

May 18, 2023

 

China launched a satellite for its BeiDou navigation system system on Tuesday night (May 16), the first time it had done so in nearly three years.

 

The BeiDou satellite lifted off atop a Long March 3B rocket from Xichang Satellite Launch Center, in southwest China's Sichuan Province, on Tuesday at 10:49 p.m. EDT (0249 GMT and 10:49 a.m. local time on May 17).

 

The spacecraft is the 56th BeiDou satellite China has lofted to date, and the first to take flight since June 2020.

 

The newly launched satellite is bound for geostationary orbit, about 22,200 miles (35,700 kilometers) above Earth.

 

Once it's up there and fully checked out, the spacecraft will serve as the first-ever backup for the BeiDou-3 Navigation Satellite System (BDS-3), according to China's state-run Xinhua news service.

 

"The satellite will expand the communication capacity of the system's regional short-messaging function, enhance positioning accuracy and promote the network's availability and stability," Xinhua wrote on Wednesday.

 

BDS-3 came online in July 2020, making China the third country, after the United States and Russia, to have its own independent satellite-navigation system. (China began launching BeiDou satellites in 2000, but the constellation didn't achieve full operational capability until BDS-3.)

 

Tuesday night's launch is part of a busy year for China, which has been ramping up its spaceflight activities and capabilities for the last decade or so. The nation plans to launch more than 200 spacecraft on at least 60 launches during 2023, and private companies based in the country could add more than 20 missions to that total.

 

https://www.space.com/china-launches-beidou-navigation-satellite-may-2023

Anonymous ID: 9dcc49 May 18, 2023, 4:09 p.m. No.18868591   🗄️.is 🔗kun   >>8595 >>8616 >>8638 >>8658 >>8837 >>9069 >>9173 >>9245

=Episode 107: FBI Whistleblowers – Firebrand with Matt Gaetz==

May 18, 2023

 

Today on FIREBRAND: Congressman Matt Gaetz recaps a huge day in the House Judiciary Committee, where a group of whistleblowers gave explosive testimony on the weaponization and politicization of the FBI against regular Americans.

 

https://rumble.com/v2oj5ue-episode-107-live-fbi-whistleblowers-firebrand-with-matt-gaetz.html

Anonymous ID: 9dcc49 May 18, 2023, 5:34 p.m. No.18868932   🗄️.is 🔗kun   >>9069 >>9173 >>9245

NASA’s Spitzer, TESS Find Potentially Volcano-Covered Earth-Size World

May 17, 2023

 

Astronomers have discovered an Earth-size exoplanet, or world beyond our solar system, that may be carpeted with volcanoes. Called LP 791-18 d, the planet could undergo volcanic outbursts as often as Jupiter’s moon Io, the most volcanically active body in our solar system.

 

They found and studied the planet using data from NASA’s TESS (Transiting Exoplanet Survey Satellite) and retired Spitzer Space Telescope, as well as a suite of ground-based observatories.

 

A paper about the planet – led by Merrin Peterson, a graduate of the Trottier Institute for Research on Exoplanets (iREx) based at the University of Montreal – appears in the May 17 edition of the scientific journal Nature.

 

“LP 791-18 d is tidally locked, which means the same side constantly faces its star,” said Björn Benneke, a co-author and astronomy professor at iREx who planned and supervised the study. “The day side would probably be too hot for liquid water to exist on the surface. But the amount of volcanic activity we suspect occurs all over the planet could sustain an atmosphere, which may allow water to condense on the night side.”

 

LP 791-18 d orbits a small red dwarf star about 90 light-years away in the southern constellation Crater. The team estimates it’s only slightly larger and more massive than Earth.

 

Astronomers already knew about two other worlds in the system before this discovery, called LP 791-18 b and c. The inner planet b is about 20% bigger than Earth. The outer planet c is about 2.5 times Earth’s size and more than seven times its mass.

 

During each orbit, planets d and c pass very close to each other. Each close pass by the more massive planet c produces a gravitational tug on planet d, making its orbit somewhat elliptical. On this elliptical path, planet d is slightly deformed every time it goes around the star. These deformations can create enough internal friction to substantially heat the planet’s interior and produce volcanic activity at its surface. Jupiter and some of its moons affect Io in a similar way.

 

Planet d sits on the inner edge of the habitable zone, the traditional range of distances from a star where scientists hypothesize liquid water could exist on a planet’s surface. If the planet is as geologically active as the research team suspects, it could maintain an atmosphere. Temperatures could drop enough on the planet’s night side for water to condense on the surface.

 

Planet c has already been approved for observing time on the James Webb Space Telescope, and the team thinks planet d is also an exceptional candidate for atmospheric studies by the mission.

 

“A big question in astrobiology, the field that broadly studies the origins of life on Earth and beyond, is if tectonic or volcanic activity is necessary for life,” said co-author Jessie Christiansen, a research scientist at NASA’s Exoplanet Science Institute at the California Institute of Technology in Pasadena. “In addition to potentially providing an atmosphere, these processes could churn up materials that would otherwise sink down and get trapped in the crust, including those we think are important for life, like carbon.”

 

Spitzer’s observations of the system were among the last the satellite collected before it was decommissioned in January 2020.

 

“It is incredible to read about the continuation of discoveries and publications years beyond Spitzer’s end of mission,” said Joseph Hunt, Spitzer project manager at NASA’s Jet Propulsion Laboratory in Southern California. “That really shows the success of our first-class engineers and scientists. Together they built not only a spacecraft but also a data set that continues to be an asset for the astrophysics community.”

 

https://www.nasa.gov/feature/goddard/2023/nasa-s-spitzer-tess-find-potentially-volcano-covered-earth-size-world

https://www.nature.com/articles/s41586-023-05934-8