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Los Angeles CA (SPX) Apr 03, 2024
Iridium Communications Inc. (NASDAQ: IRDM) has finalized the purchase of Satelles, Inc., stepping into a leading role in the provision of secure satellite-based time and location services. This strategic move introduces Iridium Satellite Time and Location (STL), a new addition to Iridium's comprehensive suite of communication solutions. The acquisition signifies Iridium's commitment to enhancing
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Video: Ariane 6 passes tests in preparation for first flight
Credit: European Space Agency

Europe's next rocket, Ariane 6, passed all its qualification tests in preparation for its first flight, and the full-scale test model has been removed from the launch pad to make way for the real rocket that will ascend to space.

The test model at Europe's Spaceport in Kourou, French Guiana, stood 62 m high. It is exactly the same as the "production model" Ariane 6 rockets that will soon be launched, except that its boosters do not need to be tested as part of the complete rocket, so the boosters are not fueled.

Teams preparing Ariane 6 for its inaugural flight successfully completed for the first time a launcher preparation and countdown sequence, on 18 July. Representatives of ESA, Ariane 6 prime contractor ArianeGroup and launch base prime contractor and test conductor CNES completed important objectives for system qualification and performed a series of actions fully representative of a launch chronology.

The launch simulation included the removal of the mobile gantry, the chill-down of ground and launcher fluidic systems, the filling of the upper and core stage tanks with liquid hydrogen (–253°C) and liquid oxygen (–183°C), and at the end of the test, the successful completion of a launch chronology up to the ignition of the Vulcain 2.1 engine thrust chamber by the ground system.

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NASA achieves milestone for engines to power future Artemis missions
The second – and final – RS-25 certification test series begins Oct. 17, 2023. When the liquid hydrogen and liquid oxygen propellants mix and ignite, an extremely high temperature exhaust, of up to 6,000-degrees Fahrenheit, mixes with water to form steam that exits the flame deflector and rises into the atmosphere, forming a cloud that subsequently cools. Credit: NASA

NASA achieved a major milestone April 3 for production of new RS-25 engines to help power its Artemis campaign to the moon and beyond with completion of a critical engine certification test series at NASA's Stennis Space Center near Bay St.

Week in images: 01-05 April 2024

Friday, 05 April 2024 12:10
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This Copernicus Sentinel-2 image features part of Victoria, a state in southeast Australia.

Week in images: 01-05 April 2024

Discover our week through the lens

A stellar role for ESA

Friday, 05 April 2024 08:30
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Noomi Rapace in 'Constellation', launched 21 February 2024 on Apple TV+

Launched on 21 February 2024 on Apple TV+, new original series Constellation has gripped viewers with its mix of sci-fi and mind-bending mystery.

Earth from Space: Victoria, Australia

Friday, 05 April 2024 07:00
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This Copernicus Sentinel-2 image features part of Victoria, a state in southeast Australia. Image: This Copernicus Sentinel-2 image features part of Victoria, a state in southeast Australia.
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Video: 00:29:37

Pablo Álvarez Fernández, one of ESA's five astronaut candidates currently undergoing basic astronaut training at the European Astronaut Centre in Cologne, Germany, shares his experiences in astronaut training, his favourite lessons, and his view on the future of space exploration. Also, stay tuned to hear his favourite space-related quote and movie!

This is Episode 5 of our ESA Explores podcast series introducing the ESA astronaut class of 2022, recorded in November 2023.

Music and audio editing by Denzel Lorge. Cover art by Gaël Nadaud.

Access all ESA Explores podcasts.

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Artist impression of glory on exoplanet WASP-76b

 

For the first time, potential signs of the rainbow-like ‘glory effect’ have been detected on a planet outside our Solar System. Glory are colourful concentric rings of light that occur only under peculiar conditions.

 

Data from ESA’s sensitive Characterising ExOplanet Satellite, Cheops, along with several other ESA and NASA missions, suggest this delicate phenomenon is beaming straight at Earth from the hellish atmosphere of ultra-hot gas giant WASP-76b, 637 light-years away.

 

Seen often on Earth, the effect has only been found once on another planet, Venus. If confirmed, this first extrasolar glory will reveal

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Total solar eclipse forecast: Will your city have clear skies Monday?
This satellite image provided by NOAA shows clouds over North America on Thursday, April 4, 2024. Credit: NOAA via AP

Some who hope to witness Monday's total solar eclipse may see the sun obscured by clouds instead of by the moon.

There's still plenty of time for forecasts to change, but meteorologists predict that eclipse day storms could blanket parts of the path, which stretches from Mexico and Texas through Maine and parts of Canada.

If clouds don't get in the way, viewers in the path wearing eclipse glasses will see the moon begin to slowly cover the sun until it is completely blocked, a period of darkness called "totality" during which temperatures drop and the sun's corona will be visible.

What's the forecast along the eclipse's path?

Clouds are expected in much of the eclipse's path Monday thanks to storms that are moving across the central U.S.

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