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Los Angeles CA (SPX) Jun 07, 2024
Dark matter, hypothesized to explain gravitational effects that general relativity cannot, remains enigmatic since its proposal in 1932 by Dutch astronomer Jan Oort. Dr. Richard Lieu from The University of Alabama in Huntsville (UAH) has published a paper in the Monthly Notices of the Royal Astronomical Society proposing an alternative theory. Lieu's work suggests gravity can exist without mass,
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NASA considering an interstellar probe to study the heliosphere, the region of space influenced by the sun
An artist’s depiction of the heliosphere, the Sun’s region of influence in space. Little is known of the actual shape of the heliosphere. Credit: NASA

The sun warms the Earth, making it habitable for people and animals. But that's not all it does, and it affects a much larger area of space. The heliosphere, the area of space influenced by the sun, is over a hundred times larger than the distance from the sun to the Earth.

The sun is a star that constantly emits a steady stream of plasma—highly energized ionized gas—called the . In addition to the constant solar wind, the sun also occasionally releases eruptions of plasma called coronal mass ejections, which can contribute to the aurora, and bursts of light and energy, called flares.

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Former astronaut William Anders, who took iconic Earthrise photo, killed in Washington plane crash
This Dec. 24, 1968, file photo made available by NASA shows the Earth behind the surface of the moon during the Apollo 8 mission.
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This still image taken from a video from Virgin Galactic on August 10, 2023, shows the launch of Virgin Galactic's private astronaut mission Galactic 02, at Spaceport America in Truth or Consequences, New Mexico
This still image taken from a video from Virgin Galactic on August 10, 2023, shows the launch of Virgin Galactic's private astronaut mission Galactic 02, at Spaceport America in Truth or Consequences, New Mexico.

Virgin Galactic is poised on Saturday for its last spaceflight before heading into a two-year pause on commercial operations to upgrade its fleet, as the company seeks to finally turn a profit.

The "Galactic 07" mission is scheduled to begin at around 8:30 am Mountain Time (1430 GMT) from the company's base in Spaceport, New Mexico, a spokesman said.

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moon
Credit: CC0 Public Domain

On Feb. 22, a lunar lander named Odysseus touched down near the Moon's South Pole and popped out four antennas to record radio waves around the surface—a moment University of Colorado Boulder astrophysicist Jack Burns hails as the "dawn of radio astronomy from the Moon."

It was a major achievement for the tenacious lander, which was built by the Houston-based company Intuitive Machines and had to overcome a series of technical difficulties to make it to the lunar surface. Burns is co-investigator on the radio experiment that flew aboard Odysseus called Radio wave Observations at the Lunar Surface of the photo Electron Sheath (ROLSES).

He'll give an update on the ROLSES data, and will share what's in store for future radio astronomy from the Moon, this week at the 244th Meeting of the American Astronomical Society in Madison, Wisconsin.

"It was heroic for Intuitive Machines to land under these conditions, and to deploy our antennas, take some data and get that data back to Earth," said Burns, professor emeritus in the Department of Astrophysical and Planetary Sciences at CU Boulder.

Ariane 6 fairing closure

Friday, 07 June 2024 16:43
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Ariane 6 fairing closure Image: Ariane 6 fairing closure
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Video: 00:01:51

SENER is testing the docking capabilities of the SIROM system by launching the MANTIS floating platform into an equally free-floating REACSA at ESA's Orbital Robotics Laboratory. This free-floating tests simulate the dynamics of rigid body contact and present an opportunity to gather valuable insights into the performance of SIROM in approximately 200 docking scenarios.

Week in images: 03-06 June 2024

Friday, 07 June 2024 12:15
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Ahead of World Ocean Day, the Copernicus Sentinel-2 mission takes us over the west of Grand Bahama Island, in the Bahamas.

Week in images: 03-06 June 2024

Discover our week through the lens

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