Discover and read the best of Twitter Threads about #spacesafety
Most recents (8)
A 1-meter meteoroid (small #asteroid) has been detected and is expected to *safely* strike Earth's atmosphere over northern France between 3:50-4:03 CET.
In the area? Look out for a #ShootingStar!☄️
#Fireball
#Sar2667
In the area? Look out for a #ShootingStar!☄️
#Fireball
#Sar2667
This is just the seventh time an #asteroidimpact has ever been predicted before it happens - a sign of the rapid advancements in global asteroid detection capabilities!
#PlanetaryDefence
#SpaceSafety
📸This was the 6th
©️Robert Weryk👉esa.int/Space_Safety/P…
#PlanetaryDefence
#SpaceSafety
📸This was the 6th
©️Robert Weryk👉esa.int/Space_Safety/P…
Last estimation shows #Sar2667's point of impact getting much closer to the #Rouen area.
Safe #AsteroidImpact
#ShootingStar☄️
People of Rouen - send us your photos if you get any!🇫🇷
@ESA_fr
Safe #AsteroidImpact
#ShootingStar☄️
People of Rouen - send us your photos if you get any!🇫🇷
@ESA_fr
On Monday, for the first time, we performed a set of manoeuvres to avoid a high-risk collision w. #SpaceDebris created in the #Cosmos1408 anti-satellite test last year.
This was a difficult #CollisionAvoidance manoeuvre.👏👏to our #Sentinel1A Control Team & Space Debris Office
This was a difficult #CollisionAvoidance manoeuvre.👏👏to our #Sentinel1A Control Team & Space Debris Office
#CollisionAvoidance monitoring is unfortunately routine work at #MissionControl, and our teams are well-practiced in reacting to high-risk events.
This near head-on #collision was however unique; the situation evolved rapidly, was tricky to avoid, AND we had <24 hrs warning
This near head-on #collision was however unique; the situation evolved rapidly, was tricky to avoid, AND we had <24 hrs warning
Sentinal-1A, part of the @CopernicusEU Sentinel-1 radar observatory providing day-and-night images of Earth’s surface, had its orbit altered by 140 m in order to prevent collision with a debris fragment ~several cm in diameter
#CollisionAvoidance
#SpaceSwerve
#CollisionAvoidance
#SpaceSwerve
Important and informative update from @SpaceX in response to widespread concerns about #SpaceSafety & #SpaceSustainability associated with #Starlink. Lots to unpack but worth investing time to do so (it's the Feb 22nd update entry btw) spacex.com/updates/
There's a strong focus on the collision avoidance capabilities of the #Starlink satellites rather than on the services that inform those capabilities. Ryan Hiles and co-authors presented a hugely valuable insight on this aspect at @amoscon last year amostech.com/TechnicalPaper…
The impact of #Starlink on the work of @SpaceForceDoD is explained clearly, as are the steps taken to manage the screening burden that has emerged with growing numbers of #Starlink satellites. That burden is continuing to grow (exponentially by my estimates)
Solar cycle 25: the Sun wakes up🌤️
Experts on the Solar Cycle 25 Prediction Panel recently announced the Sun has officially entered a new cycle, its 25th since we’ve had enough data to reliably recognise them.
👉 esa.int/Safety_Securit…
ESA/NASA SOHO, 2012 - Brendan Gallagher
Experts on the Solar Cycle 25 Prediction Panel recently announced the Sun has officially entered a new cycle, its 25th since we’ve had enough data to reliably recognise them.
👉 esa.int/Safety_Securit…
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.
©️NOAA
©️NOAA
“While small and medium-sized solar storms are more likely during peak solar activity,” says Jussi Luntama, Head of ESA’s #SpaceWeather Office, “its important to remember that individual large solar events can happen any time, independent of we are in the solar cycle.”
It's time for my (seemingly monthly) look at conjunctions involving #Starlink satellites, as predicted by celestrak.com/SOCRATES/. In this month's update I have corrected an error in the conjunction rates for June, July & August (I missed some conjunctions) (1/n) #SpaceSafety
In the SOCRATES report from 30 September 2020, with just over 680 #Starlink satellites in orbit (v0.9 & v1.0), there were 6957 conjunctions < 5 km involving at least one #Starlink satellite (17.7% of all conjunctions in the SOCRATES report) for the 7 days ahead) (2/n)
The number of conjunctions < 5 km involving a #Starlink satellite & something else (i.e. not Starlink) over the 7-day period was 2828 (7.2% of all conjunctions in the SOCRATES report) (3/n)
Heute hat die ESA einen Auftrag für die detaillierte Konzeption, den Bau und die Tests von #Hera, der ersten ESA-Mission zur planetaren Verteidigung, vergeben 👇
esa.int/Space_in_Membe…
#SpaceSafety
esa.int/Space_in_Membe…
#SpaceSafety
Here is a thread-based version of my talk at the @AeroSociety conference on 'Safeguarding Earth's Space Environment' that I hope gets some key points across about modelling #spacedebris & how it can help to identify the data we need to understand #SpaceSustainability (1/n)
Caveat: I use images as metaphors, to help with understanding of key concepts, so my slides have no words in them. (2/n)
Our models have two distinct roles: PREDICTION and UNDERSTANDING. Understanding can help us to design better models and gather more relevant data. Both of these roles are important in relation to #SST, #SpaceSafety and #SpaceSustainability (3/n)
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
#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
@esa @SpaceX @ESA_EO Experts in our #SpaceDebris team calculated the risk of collision between these two active satellites, determining the safest option for #Aeolus would be to increase its altitude and pass over the @SpaceX satellite
#CollisionAvoidance
#CollisionAvoidance
