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Weather satellite passes bake and shake tests with flying colours
The first Meteosat Third Generation Sounder (MTG-S1) satellite ready to go into the thermal vacuum chamber where it remained for three weeks being exposed to extreme temperatures, ranging from –180°C to +250°C. Credit: OHB

As climate change drives more frequent and severe weather events, the need for accurate and timely forecasting has never been more critical. And now, the next Meteosat Third Generation weather satellite has passed its environmental test campaign with flying colors, taking it a significant step closer to launch.

This new generation of satellites is set to transform weather forecasting, particularly in Europe.

Following the spectacular launch of the first MTG-Imager in 2022, which marked the debut of this advanced family of six satellites, all eyes are now on the first MTG-Sounder (MTG-S1) satellite.

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Juice's lunar-Earth flyby: all you need to know
Juice spacecraft in front of Earth, with the Milky Way in the background. Credit: ESA

ESA's Jupiter Icy Moons Explorer (Juice) will return to Earth on 19–20 August, with flight controllers guiding the spacecraft first past the moon and then past Earth itself. This "braking" maneuver will take Juice on a shortcut to Jupiter via Venus.

What is happening?

It's a double world first. The first-ever lunar-Earth , and the first-ever double gravity assist maneuver. It will change Juice's speed and direction to alter its course through space, but it's a daring feat; the slightest mistake could take Juice off course and spell the end of the mission.

Following Juice's launch in April 2023, this lunar-Earth flyby is the first step in the spacecraft's waltz through the solar system on its journey to Jupiter.

During the flyby, Earth will bend Juice's trajectory through space, "braking" it and redirecting it on course for a flyby of Venus in August 2025.

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Resources on Mars could support human explorers
Mineral map of Mars showing the presence of patches that formed in the presence of water. Credit: ESA

In the coming decades, multiple space agencies and private companies plan to establish outposts on the moon and Mars. These outposts will allow for long-duration stays, astrobiological research, and facilitate future solar system exploration. However, having crews operating far from Earth for extended periods will also present some serious logistical challenges.

Given the distances and costs involved, sending resupply missions will be both impractical and expensive. For this reason, relying on local resources to meet mission needs—aka. In-situ resource utilization (ISRU)—is the name of the game.

The need for ISRU is especially important on Mars as resupply missions could take six to nine months to get there. Luckily, Mars has abundant resources that can be harvested and used to provide everything from oxygen, propellant, , soil for growing food, and .

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Video: 00:38:42

ESA astronaut Alexander Gerst, an experienced spaceflyer, spacewalker, and former ISS commander, shares insights into his role as head of astronaut operations at ESA’s European Astronaut Centre. Tune in as he talks with us about guiding the next generation of astronauts through training and preparing them for their future in space exploration. 

This is Episode 8 of our ESA Explores podcast series, delving into everything you want to know about the ESA astronaut class of 2022. Recorded in April 2024.

Find out more about Alexander.

Access all ESA Explores podcasts.

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lunar surface
Credit: Pixabay/CC0 Public Domain

The presence of conduits below the lunar surface has been theorized and extensively debated for at least 50 years. Now, an analysis of NASA Lunar Reconnaissance Orbiter radar data reveals what lies below the Mare Tranquillitatis.

For the first time, scientists have demonstrated the existence of a tunnel in the lunar subsurface. It seems to be an empty lava tube. The study, published in Nature Astronomy, is the result of an international collaboration.

"These have been theorized for over 50 years, but it is the first time ever that we have demonstrated their existence," explains Lorenzo Bruzzone, professor at the University of Trento.

Bruzzone explains, "In 2010, as part of the ongoing LRO NASA mission, the Miniature Radio-Frequency (Mini-RF) instrument acquired data that included a pit in Mare Tranquilitatis.

"Years later, we have reanalyzed these data with complex signal processing techniques we have recently developed, and have discovered radar reflections from the area of the pit that are best explained by an underground cave conduit. This discovery provides the first direct evidence of an accessible lava tube under the surface of the moon.

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Juice flies by Earth

Juice’s lunar-Earth flyby: all you need to know

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Video: 00:02:44

After many long hours, working through the night, plenty of sacrifices, tense moments during countdown and hot-fire tests – as well as months spent in masks and keeping a safe distance during the COVID-19 pandemic – Space Team Europe has done it. Ariane 6 took flight on 9 July 2014 and restored Europe’s autonomous access to space.

Thousands of people from different backgrounds, with different nationalities and speaking different languages all united around a shared vision: taking Europe to space.

Thank you Space Team Europe for your commitment, incredible team spirit and expertise. Go Ariane 6!

Ariane 6 launched on

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Juice flies by Earth

ESA’s Jupiter Icy Moons Explorer (Juice) will return to Earth on 19–20 August, with flight controllers guiding the spacecraft first past the Moon and then past Earth itself. This ‘braking’ manoeuvre will take Juice on a shortcut to Jupiter via Venus.

Write a comment
MTG-S1 in the anechoic chamber

As climate change drives more frequent and severe weather events, the need for accurate and timely forecasting has never been more critical. And now, the next Meteosat Third Generation weather satellite has passed its environmental test campaign with flying colours, taking it a significant step closer to launch.

Write a comment
Vancouver, Canada (SPX) Jul 14, 2024
In late April, farmers in Saskatchewan stumbled upon spacecraft fragments while preparing their fields for seeding. It sounds like the beginning of a science fiction movie, but this really happened, sending a powerful warning: it is only a matter of time before someone is seriously hurt or killed by falling space junk. The Axiom Space private astronaut mission (Ax-3) concluded safely on Fe
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Los Angeles CA (SPX) Jul 15, 2024
In June, engineers at NASA's Marshall Space Flight Center in Huntsville, Alabama, revealed a new 11-inch hybrid rocket motor testbed. The innovative testbed features variable flow capability and a 20-second continuous burn duration, offering a cost-effective and quick-turnaround solution for conducting hot-fire tests on advanced nozzles, rocket engine hardware, composite materials, and pro
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