NASA develops a flower-type space shade to help photograph exoplanets

NASA develops a flower-type space shade to help photograph exoplanets

According to the British "Daily Mail" report, at first glance this may seem like a flower in full bloom in space, but in fact this is the latest equipment that NASA is trying to develop. NASA hopes that this device will work for those There are living distant planets for imaging. The part of the device that appears to be full of petals can block the starlight, allowing the telescope to image the tiny planets orbiting it. Experts hope that this progress will revolutionize our understanding of exoplanets.

Astronomers have already begun to use some indirect methods to search for exoplanets as early as 15 years ago, but to really shoot such a planet has proved to be extremely difficult. The researchers said that finding the spot of a weak planet around a star that is billions of times brighter than it is is like finding a needle from a straw pile. This is especially true if the target we are looking for is a small rocky planet like the Earth.

In order to achieve this goal, scientists are developing devices that can block bright star light, but at the same time retain and reveal the glimmer of the planets they are photographing. This technique is called "star block."

It is to achieve such a goal that engineers are building a huge "space sun flower" - a starlight shader. When this special equipment is put into use, it will work together with the space telescope. It can position itself very accurately between the telescope and the observed target object, obstructing the star light from the star, making it impossible to influence the observation of the space telescope.

When the starlight is obscured, the dim light of the planets orbiting the star appears. Using this technique, astronomers are expected to actually take images of exoplanets, which will provide key clues about whether or not these bodies existed. The shape of the petals used in this design is one of the reasons why it is so efficient.

Dr. Stuart Shaklan of NASA's Jet Propulsion Laboratory is the chief engineer of the Star Shading program. He said: "The shape of the petal, when you observe from a distance, will form a gentler one. Edges, so as to avoid excessive bending of the light. The reduced degree of bending of the light means that the shadows after our shadow will be dark, so that the space telescope can capture the planets that were originally submerged in the light of the stars."

Another aspect of the astral light obscuring scheme is different from other space facilities. That is, as mentioned above, it is only an integral part of a complete observation system together with the space telescope. Shaklan said: "In this way, we can use a telescope that had previously been launched and lifted to carry out observation activities. This space device has thrusters that can move freely to shield different stars."

Jeremy Kasdin is the chief scientist of the Star Shading Project and is from Princeton University. He said: "The problem we are currently facing is how to ensure that all petals can be accurately deployed in space to the correct position, with an accuracy of millimeters. Such a project will allow us to directly face those planet-sized exoplanets. We do the imaging and this is what we can't do on the ground. We will be able to show people a photo with a little dot on it and tell them that it's another earth."

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