Tag Archives: nasa

Two women walk outside the space station at the same time

This is the first time that two female astronauts from the US space agency NASA are walking outside the International Space Station (ISS). Names Christina Koch and Jessica Mir.

They exited the space station’s Quest Airlock (the door used during the spacewalk) to replace a power control unit that broke down on Friday.

Women have never been seen working like this outside the International Space Station without a male astronaut. Replacing the power regulator is expected to take them 5 to 6 hours.

Christina Koch has done four spacewalks in space before. However, this is the first spacewalk of Jessica Mir to go with him. According to NASA, she is the 15th woman to walk in space.

Christina is an electrical engineer and Jessica is a doctorate in marine biology. At 11:38 in the gym, they went out to the spacewalk. At the end of the work, they will return to Arial with the broken device. It will then be sent to Earth in a SpaceX Dragon capsule for testing.

Christina Koch was scheduled to do the job last March with another colleague, Ann McClain. But it didn’t happen because McClean didn’t have the right spacesuit.

This initiative of the two women is a milestone at a time when NASA is working to emphasize the contribution of women in space.

Two women walk outside the space station at the same time
Two women walk outside the space station at the same time

Christina said that before, women were not always seen in such a significant role. It feels great to be able to contribute as a woman in space now. Everyone can play a role now. This is paving the way for increasing the chances of success.

Meanwhile, Jessica said, “Today we are able to work as part of the team. It’s good to be able to come this far. ”

Russian Svetlana Savitskaya was the first woman to walk in space. He walked for 3 hours outside the USSR space station on July 25, 1984. He was accompanied by astronaut Vladimir Zhanibekov.

And the first person to do a spacewalk in history was Soviet astronaut Alexei Leonov. He died earlier this month at the age of 65.

Finding wonder structures near the center of the earth

Many may be curious about what is at the center of the earth. Researchers have come up with a wonderful new report. Researchers say that under the earth’s surface, there is a huge structure near the core, which they found by analyzing the seismic waves.

This research article was recently published in the journal Science.

According to a report in the scientific journal New Scientist, an analysis of seismic wave data showed that the giant structure was located 2,900 kilometers below the Earth’s surface at the boundary of the Earth’s molten core and hard crust.

Finding wonder structures near the center of the earth
Finding wonder structures near the center of the earth

Analyzing data from hundreds of large earthquakes, University of Maryland researcher Dwayne Kim and his colleagues found a new structure beneath the volcanic Marquesas Island in the South Pacific Ocean. Kim said the structure is known as the Ultra Low Velocity (ULV) zone. It is about 1000 km in diameter and 25 km thick.

The reason why this structure is called ultra low velocity is that the seismic waves pass through it slowly. However, the matter of making it is still a mystery. These structures may be chemically separate from the Earth’s iron, nickel alloy cores, and silicate rock mantles, or may have different thermal properties.

The research team also found that a previously discovered ULV region beneath the Hawaiian Islands is much larger than previously thought.

Researcher Kim said the study of the mantle of the earth is important. Because the structure of the earth has evolved and changed over time. The mantle of the earth is where the operation is taking place and it is the region of the driven process for tectonic plates and hotspot volcanoes.

Identifying ULV regions can also help to better understand whether some volcanic sources are below the Earth’s crust and the formation of the Earth’s lower mantle.

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