Hundred-day baby photography astronaut

Today, let's talk about why space technology has changed people's lives.

In fact, many people don't know that sunglasses, food desiccant, radio equipment, bar codes used in shopping machines, electronic thermometer, heart rate meters, color B-ultrasound and other equipment and technologies are closely related to space technology. It can be said that we use the convenience brought by space technology to our lives every day.

To put it simply, when people want to go to a strange place, they must use mobile navigation. In the past, mobile navigation was useless. You don't know how far you are from where you want to go, and you don't know which way is the shortest, so it is very difficult to go to a place at that time and you need to ask for directions constantly.

But then with navigation, it was different. If you want to go to a strange place, just take out your mobile phone and find the location on the map, and then choose the route you want to take. So how did sailing come into being?

Navigation originated from the space satellite system. The GPS system in America was first developed and widely used. 1978 the United States launched a GPS satellite, and 1995 the GPS satellite was fully operational. In addition, GPS satellites not only help people's lives in route planning and navigation, information inquiry and emergency rescue, but also have strong military uses.

If you think this example is far away, say a more recent one. Vegetable seasoning bag in instant noodles? Do you think it's incredible to hear that the small vegetable seasoning bag actually comes from space technology?

Actually, it's true. The vegetable seasoning package in instant noodles uses dehydrated vegetables and dehydrated vegetables. It was first invented for astronauts, because astronauts need to stay in space for hundreds of days when they perform exploration missions in space, but astronauts who perform missions also need to eat vegetables to supplement vitamin nutrition.

However, because the space environment is different from the earth environment, the space of the spacecraft is not very large, and many fresh vegetables cannot be preserved. Even if they can, these fresh vegetables will rot easily in the space environment. Therefore, in order to solve this important problem, in the Apollo program of the United States, NASA invented the frozen dehydrated vegetable technology. This technology can not only retain 98% nutrients in vegetables, but also remove all water charges in vegetables, which also enables them to be removed.