Thread by @zetagravit

Do you know story behind taking first image of Black hole ?

Here's #Thread for you (1/n)

#BlackHole

In order to capture shadow of blackhole at center of M-87, we need baseline of Earth diameter scale and wavelength of 1.3mm. So EHT was used. (2/n)

The EHT (Event Horizon Telescope) is a telescope that uses very long baseline interferometry (VLBI) to directly measure the "visibilities" of radio sources. The telescope has a network of many small telescopes around the world that work together to create a virtual telescope (3/n

More about Telescope and Observation, Correlation and Calibration (4/n)

What's Next step ? (5/n)

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Imaging algorithms are used to create images from data. These images are designed to be physically plausible (e.g., positive and compact) or conservative (e.g., smooth) and at the end GRMHD Models were lokking same as EHT simulation and first image of Blackhole was obtained(8/n)

So here's wrap. If you enjoy reading this informative thread than you can follow @zetagravit for daily space related content on Twitter and instagram.

⚠️Check next slide for Bonus ! ! !

Aditya L1 is going to be the first Indian Space mission to study the Sun's upper-Atmosphere also Known as "Solar Corona". It is jointly developed by ISRO, PRL, IUCAA and IIA. Here's illustration of Different Lagrange point.

Read more about it from : zetagravit.in/post/adityal1