Khoa họcTin tức

How are the astronauts inside when the ISS increases in altitude?

The European Space Agency released a video of the scene in the ISS when the Russian spacecraft burned its engines to increase the station’s altitude in March.

How are the astronauts inside when the ISS increases in altitude?

The crew on board the International Space Station (ISS) in March, when the Russian spacecraft ignited its engines to gain altitude, was Expedition 66. Members included Raja Chari, Thomas Marshburn Kayla Barron and Mark Vande Hei (NASA), Matthias Maurer (European Space Agency), Anton Shkaplerov and Pyotr Dubrov (Russian Space Agency Roscosmos).

ESA’s video is reminiscent of players sliding down a slide – then immediately back in line to get off again, SciTechDaily reported on May 13. While it looks like the astronauts are moving inside the ISS station, the station is actually moving around them. The actual action doesn’t go that fast either because the video has been fast forwarded 8 times.

ESA does not publish data on the acceleration of this engine fire. In a previous engine fire with a time of 12 minutes and 17 seconds, the change in velocity was 1.34 m per second.

In the video, the astronauts are enjoying the exciting experience. The experience is somewhat similar to when a car or airplane accelerates – it feels like the passenger is being pushed into the seat, when in reality, the seat is being pushed into the occupant due to the car’s acceleration.

The ISS usually moves about 400 km above Earth, but the effects of atmospheric drag can cause the station to descend up to 100 meters per day. As a result, experts have to regularly perform orbital climbs for the station, usually about once a month.

There is no specific timetable for when this will happen because the density of the atmosphere at these altitudes is constantly changing, depending on how much energy the Sun is launching. As a result, the descent rate is inconsistent. The ISS descends into orbit faster than other satellites at similar altitudes due to its size and large surface area.

In addition, the increase in altitude is also to optimize the orbital position of the ISS for the soon-to-be docking vehicles. The March climb was conducted by Progress 79, a Russian cargo ship docking with the station. By igniting the ship’s engines for a few minutes, the ISS was brought to a height suitable for the Soyuz spacecraft carrying the new crew to the station.

All propulsion of the ISS is provided by Russia’s Progress propulsion systems and cargo ships, according to NASA. Thrust is used for altitude gain, directional control, space junk avoidance, and suborbital operations. American instruments provide routine direction control for the ISS. Meanwhile, Russian thrusters are used to control direction in events like spacecraft docking.

Northrop Grumman’s Cygnus is the only US commercial spacecraft currently capable of ascending the ISS, although it is still in test mode. The first Cygnus spacecraft capable of doing this flew to the station in February.

Thu Thao (According to SciTechDaily)

You are reading the article How are the astronauts inside when the ISS increases in altitude?
at – Source: – Read the original article here

Back to top button