What causes unusual knots of gas and dust in planetary nebulas? Seen also in the Ring Nebula, the Dumbbell Nebula and NGC 2392, the knots' existence was not initially predicted, and their origins are still not well understood. Pictured here is a fascinating image of part of the Helix Nebula by the James Webb Space Telescope showing tremendous detail in infrared light. The cometary knots have masses similar to the Earth but have sizes typically several times the orbit of Pluto. One hypothesis for the fragmentation and evolution of the knots includes existing gas being driven out by a less dense but highly energetic stellar wind of the central evolving star. The Helix Nebula is one of the closest examples of a planetary nebula created at the end of the life of a Sun-like star. Given a technical designation of NGC 7293, the Helix Nebula lies about 650 light-years away towards the constellation of Water Carrier (Aquarius). Open Science: Browse 4,000+ codes in the Astrophysics Source Code Library
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Neuraspace, the Portuguese space traffic management startup, announced around $18 million in fresh funding Aug. 5 to expand European space domain awareness and defense capabilities. The post Neuraspace raises $18 million to expand sovereign space awareness appeared first on SpaceNews.
Voyager Technologies remains upbeat about the prospects for its Starlab commercial space station but is hoping for some tweaks to NASA’s plans to support the station’s development. The post Voyager seeks relaxed requirements in NASA commercial space station RFP appeared first on SpaceNews.
SpaceX plans to start deploying upgraded Starlink satellites into orbit on the next flight of its Starship vehicle, scheduled for as soon as the end of the month. The post SpaceX to begin Starship orbital flights appeared first on SpaceNews.
The companies, along with a third unidentified vendor, won $615 million in contracts for the AMTI satellite program The post Rocket Lab, STR win Space Force contracts for airborne-target tracking appeared first on SpaceNews.
Arctic communications award will fund an expansion of Telesat’s Lightspeed, taking the planned LEO network to 225 spacecraft The post Telesat lands $1.63 billion Canadian defense contract appeared first on SpaceNews.
SAN FRANCISCO – The National Oceanic and Atmospheric Administration will continue to evaluate data from Spire Global’s Hyperspectral Microwave Sounder (HyMS) under a $3 million contract extension announced Aug. 4. […] The post NOAA purchases Spire hyperspectral microwave sounder data appeared first on SpaceNews.
