Protesting "Space Graffiti"
In the next 9 months, the brightest star in the sky will be an oversized "disco ball."
This little fat man in space is a "waist" 1 meter carbon fiber ball with 65 silvery high-reflective surfaces that wrap around the earth every 90 minutes. It can reflect the sun, and every time it is dusk or dawn, it can be seen in any corner of the earth.
In New Zealand, this “feat†has been hailed as an “unprecedented step†in commercial space exploration. The New Zealand start-up Rocket Lab, which secretly sent it to space, also gave it a very human name, the "Human Star."
"Let everyone on the planet have a common experience" is the wish of the company's CEO Peter Baker. He hopes that no matter whether poverty or wealth, health or disease, war or peace, people can forget the shackles in front of the "Star of Man" and look up at the stars, and turn their eyes to the vast universe to think about life from another angle.
However, this bowl of literary and romantic "chicken soup" failed to impress the astrophysicists, and instead became the unpopular "space graffiti" in their eyes, and was attacked by the group.
Excessively bright man-made objects can affect scientists' observation of the starry sky and create more garbage in fragile space. This is another form of "human invasion of the universe." After nine months of operation, the satellite will be burned on the way back to the Earth's atmosphere.
More importantly, it may cause people to lose the fear of nature and the unknown.
Just like putting colorful lights on polar bears and sticking corporate slogans to the highest point in Everest, no one will applaud such "creatives." Similarly, sending a shiny "disco ball" into space is not cool at all.
Aerial " 3D printing "
A glowing purple butterfly fluttered and fell to the fingertips of the scientist. It comes from the future.
This is a picture that humans have imagined countless times. In the movie "Star Wars", the robot R2-D2 transmits the image of Princess Leia to the thin air, becoming one of the most classic bridges in science fiction movies. The latest research published by Brigham Young University in Nature magazine is "like walking down the movie screen."
Capture the particles in the air with an invisible laser beam and drag it to every point on the image. A second set of red, green, and blue lasers are projected to illuminate the particles that are moving fast. In the words of scientists, this is equivalent to "printing things in the air in 3D and quickly wiping it off." As long as the speed is fast enough, the trajectory of its movement will form a solid line in the line of sight of the person, like a fireworks in the dark.
This is the first time humans have painted a true three-dimensional image, and it is "real more than imagined." Let a circle of people around it, everyone can see a different picture. Although the past holograms appear to be three-dimensional, "all magic takes place on a two-dimensional surface."
This technology is still immature. The images created by scientists are either very small or very slow. The butterfly, which consists of purple spots, is only a few millimeters long and barely visible to the naked eye. A researcher painted the look of Princess Leia and took it for 40 seconds.
After all, we are one step closer to the imaginary future.
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