Share with friends and circles of friends with wechat scanning QR code < / P > < p > on March 15, two astronauts from NASA are scheduled to carry out their first spacewalk this year on Tuesday, local time, to help upgrade the power system of the international space station < p > the spacewalk is expected to last six and a half hours. Astronauts Kayla Barron and Raja Chari will assemble a modified kit to upgrade solar panels outside the space station in the future. The two astronauts will install struts and brackets to support more extensible solar panels called irosa < p > during the spacewalk, Barron will wear a spacesuit with red stripes to become the extravehicular crew of No. 1, while Charlie will wear a spacesuit without stripes to become the extravehicular crew of No. 2. Barron completed her first spacewalk last December, her second spacewalk mission, but it was the first spacewalk in Charlie's astronaut career < p > previously, astronauts had installed two irosa in the spacewalk. When all new solar panels are installed, they are expected to add six power channels to the space station, increasing the available power from 160 kW to 215 kW < p > six of the irosa solar panels were delivered to the space station by SpaceX during its 22nd resupply mission (June 5). These panels are rolled up like carpets, each weighing about 340kg and 3 meters wide. In future replenishment missions, four more solar panels will be delivered < p > although the solar panels on the space station are still in operation, they have supplied power to the space station for more than 20 years. After long-term exposure to the space environment, there are many signs of wear and tear. Moreover, the initial design life of these panels is only 15 years < p > the new solar panel will be placed in front of the existing solar panel, which is also a key test of the new panel, because the same design will provide power for the lunar space station gateway, an orbital outpost that will help NASA return to the moon through the Artemis program < p > NASA is also preparing for the second spacewalk on March 23. Although the identity of the astronauts on mission has not been announced, they are expected to be responsible for a series of installation and upgrading, including replacing the external camera of the space station and installing hoses on the radiator beam valve module, which transmits ammonia to the radiator of the space station to maintain the appropriate temperature. (small) < / P > < p >