The Event Horizon Telescope cannot produce an image of black hole shadow the manner Interstellar portrayed, we are only likely to see pixelated images put together from radio data. But even …
The Event Horizon Telescope cannot produce an image of black hole shadow the manner Interstellar portrayed, we are only likely to see pixelated images put together from radio data. But even then, it’ll nonetheless be a significant historical moment. On Apr 10, members of the Event Horizon Telescope are set to make a groundbreaking, announcement. The EHT is a unified network of telescopes using which scientists are hoping to catch the first images of the face of the black hole in the middle of the Milky Way galaxy.
While this black hole, situated at some point in the sky called Sagittarius A, is over 20 million km wide and weighs 3.5-4 million solar masses, it’s also extremely far away: 26, 000 lightyears. So astrophysicists who wanted to study it’d a challenge: to discover a way to see something the magnitude of ideal on the moon surface. They responded by developing the EHT. Along with the EHT solved their problem by means of a method called VLBI, described below. On June 25, 2014, scientists announced the discovery of a trio of supermassive black holes in the center of a galaxy 4.2 billion light-years away.
The find was imputed into the European VLBI Network. A Space.com report stated that this network can see the details 50 times finer than is possible with the Hubble Space Telescope. How was this achieved? VLBI stands for very long baseline interferometry. It’s a technique utilized in astronomy to get high-resolution pictures of the sky by means of a network of telescopes across the planet that may – with the help of high technology computing – Get close to mimicking the sharpness of a hypothetical telescope almost the size of a planet. It’s commonly used to image cosmic radio sources, like quasars, although it’s also sometimes used to study stars.
The concept has its origins in Thomas Young’s famous double slit experiment, that he conducted in 1801. When Young put a screen with two slits in front of a source of light, like a candle, the shadow cast on the other side wasn’t only two bright spots. It had been really a patchwork of bright and dull bands, like when the candle lighting had passed through slits. This was the interference pattern. Young’s experiment was important to establish that light travels like a wave, overturning Newton’s belief that light was composed of particles. When light passes through every slice, it diffracts, i.e.
Begins to spread out. At some point in front of the slits, the diffracted waves meet and hinder. Where crest of one wave fulfilled the crest of another, the joint wave had a much crest compared to the two and cast a bright spot on the screen. Where crest fulfilled trough they canceled each other. And where trough and trough fulfilled, there was a dark ring on the screen – a shadow.