ESA/NASA SOHO, 2012 - Brendan Gallagher
While we can expect #spaceweather to get more exciting in the next few years, with peak sunspot activity expected in 2025, the panel came to the consensus that this next cycle will be very similar to the previous – both generally weaker than the average solar cycle.
In particular, teams are rehearsing the 'Launch and Early Orbit Phase' – the riskiest period in the fledgling spacecraft's life
Find out more🛰️👉esa.int/Enabling_Suppo…
Like a bird hatching from the egg, this is the period in which a new spacecraft unfurls its solar arrays, wakes up to test its core functioning and manoeuvres into the correct path, all the while at its most vulnerable to the hazards of space.
The second most likely asteroid to strike Earth is 2018 VP1. A tiny little thing, it is estimated to be just 2.4 m in diameter and has a (relatively) high chance of striking Earth in November this year of 1 in 193
Even though 2018 VP1 seems very small, meteorites still regularly reach Earth's surface - it all depends on the composition of the asteroid.
ESA & @mfnberlin are currently studying the physical processes as an asteroid enters Earth's atmosphere with velocities above 11 km/s
Oct 1, 2019 • 9 tweets • 5 min read
To date, more than 5800 launches have resulted in over 44,000 tracked objects in orbit, of which more than 20,000 remain in space and are regularly tracked by surveillance networks around the globe #SpaceDebris🛰️
~26% of catalogued objects are satellites, and only a small fraction of those - about 2000 - are still operating today
~17% of tracked objects are used upper stages of rockets and mission-related objects like launch adapters and lens covers
A drifting thermal blanket,📸1998
Sep 2, 2019 • 11 tweets • 16 min read
For the first time ever, ESA has performed a 'collision avoidance manoeuvre' to protect one of its satellites from colliding with a 'mega constellation' #SpaceTraffic@esa This morning, @ESA's #Aeolus Earth observation satellite fired its thrusters, moving it off a collision course with a @SpaceX satellite in their #Starlink constellation