OrbitalHub

Wikipedia dicit:

Extravehicular activity (EVA) is any activity done by an astronaut in outer space outside a spacecraft. In the absence of a breathable Earthlike atmosphere, the astronaut is completely reliant on a space suit for environmental support. EVA includes spacewalks and lunar or planetary surface exploration (commonly known from 1969 to 1972 as moonwalks). In a stand-up EVA (SEVA), an astronaut stands through an open hatch but does not fully leave the spacecraft. EVAs have been conducted by the Soviet Union/Russia, the United States, Canada, the European Space Agency and China.

On March 18, 1965, Alexei Leonov became the first human to perform a spacewalk, exiting the Voskhod 2 capsule for 12 minutes and 9 seconds. On July 20, 1969, Neil Armstrong became the first human to perform a moonwalk, outside his lunar lander on Apollo 11 for 2 hours and 31 minutes. In 1984, Svetlana Savitskaya became the first woman to perform a spacewalk, conducting EVA outside the Salyut 7 space station for 3 hours and 35 minutes. On the last three Moon missions, astronauts also performed deep-space EVAs on the return to Earth, to retrieve film canisters from the outside of the spacecraft. American Astronauts Pete Conrad, Joseph Kerwin, and Paul Weitz also used EVA in 1973 to repair launch damage to Skylab, the United States’ first space station.

EVAs may be either tethered (the astronaut is connected to the spacecraft; oxygen and electrical power can be supplied through an umbilical cable; no propulsion is needed to return to the spacecraft), or untethered. Untethered spacewalks were only performed on three missions in 1984 using the Manned Maneuvering Unit (MMU), and on a flight test in 1994 of the Simplified Aid For EVA Rescue (SAFER), a safety device worn on tethered U.S. EVAs.

Video credit: SpaceX

NASA dicit:

This is a sonification of X-ray light emitted by the Crab Nebula. The data was obtained by NASA’s NuSTAR and Chandra space observatories, whose teams turned the data into sound to enable people to audibly perceive different features of the Crab Nebula, making it more accessible for the visually impaired.

In this sonification, X-ray wavelengths from NuSTAR (represented as different colors) are mapped to different musical pitches and sounds. Red, yellow, purple, blue, and white are mapped to notes from low to high. For Chandra, brightness in the X-ray data corresponds with pitch and volume, and a bell sound indicates the position of the pulsar at the center of the nebula.

The Crab Nebula is what remains of a star that exploded as a supernova. The explosion that created the Crab Nebula was visible from Earth in the year 1054, when it was recorded by Chinese astronomers. Most of the star’s mass was pushed into space, creating a wide debris field that continues to expand.

The rest of the stellar material collapsed into a dense object called a pulsar. The pulsar’s rapid rotation and strong magnetic field accelerate particles and shoot them into space.The particles emit high-energy X-rays that NuSTAR can detect, but as they travel outward, they collide with the debris scattered by the supernova, causing them to slow down and lose their energy. This is why NuSTAR only sees light from a relatively small region close to the pulsar. Lower energy X-rays detected by Chandra can be seen farther out.

Video credit: NASA/JPL-Caltech/CXC/SAO

Wikipedia dicit:

Boeing Crew Flight Test (Boe-CFT) is the first crewed mission of the Boeing Starliner capsule. Launched on 5 June 2024, the mission flew a crew of two NASA astronauts, Barry E. Wilmore and Sunita Williams, from Cape Canaveral Space Force Station to the International Space Station. The crew’s return to Earth, a planned 14 June ground landing in the American Southwest, has been delayed while Boeing works to diagnose various problems with the spacecraft.

The crewed flight test was initially planned to occur in 2017, but various delays pushed back the launch. The spacecraft’s first two uncrewed orbital flight tests of the capsule, Boe-OFT and Boe-OFT 2, took place in 2019 and 2022.

The spacecraft was integrated with the Atlas launch vehicle on 16 April 2024 in preparation for launch. The flight was scheduled for 7 May 2024 but was scrubbed about two hours before liftoff due to an oxygen valve problem on the United Launch Alliance’s (ULA) Atlas V. After the initial scrub, the launch was repeatedly delayed due to a helium leak in the Starliner service module. The second launch attempt was on 1 June, but was scrubbed 3 minutes, 50 seconds before liftoff when the ground launch sequencer computer registered a loss of redundancy due to a faulty power supply. The third launch attempt, on 5 June at 14:52 UTC, was successful.

During the flight to the ISS, additional helium leaks were discovered, though these were still too small to threaten the mission. As Starliner approached the ISS, five reaction control system thrusters failed, likely unrelated to the helium leaks. Resetting and firing the thrusters eventually made four out of five work again, and the Starliner safely docked with the ISS after a delay. The thruster malfunction looks identical to unresolved problems encountered during OFT 2 and will likely have to be fixed before Starliner is certified by NASA.

As of 23 June 2024, the spacecraft remains docked to the ISS. The return to earth flight was originally scheduled for 14 June, but is postponed indefinitely to some time in July, while the problems so far discovered are reviewed for the safety of the return flight.

Video credit: NASA’s Kennedy Space Center

Wikipedia dicit:

GOES-U is a weather satellite, the fourth and last of the GOES-R series of satellites operated by the National Oceanic and Atmospheric Administration (NOAA). The GOES-R series will extend the availability of the Geostationary Operational Environmental Satellite (GOES) system until 2036. The satellite is built by Lockheed Martin, based on the A2100 platform.

The satellite is expected to be launched into space atop a SpaceX Falcon Heavy rocket on June 25, 2024, delayed from April 30 2024, from Kennedy Space Center, Florida, United States. The redesign of the loop heat pipe to prevent an anomaly, as seen in GOES-17, is not expected to delay the launch as it did with GOES-T.

GOES-U will also carry a copy of the Naval Research Laboratory’s Compact CORonagraph (CCOR) instrument which, along with the CCOR planned for Space Weather Follow On-Lagrange 1 (SWFO-L1), will allow continued monitoring of solar wind after the retirement of the NASA-ESA SOHO satellite in 2025.

It will have a dry mass of 2,925 kg (6,449 lb) and a fueled mass of 5,000 kg (11,023 lb).

Video credit: Lockheed Martin