Description

India recently dedicated the world's largest International Liquid Mirror Telescope (ILMT) in Devasthal, Uttarakhand. This four-meter telescope was built specifically for astronomical observations and is India's first optical survey telescope. The observatory will search the deep celestial sky for objects ranging from asteroids to supernovae and space debris.

About International Liquid Mirror Telescope (ILMT)

The ILMT features a rotating mirror with a 4-meter diameter made of a thin layer of liquid mercury that is highly reflective and designed to survey the strip of sky that passes overhead each night. A bowl containing reflecting liquid mercury metal, an air bearing (or motor) on which the liquid mirror sits, and a drive system make up the telescope. A scientific-grade thin transparent mylar film protects the mercury from the wind. The reflected light is processed by a sophisticated multi-lens optical corrector, which produces sharp images across a wide field of view. A 4k × 4k CCD camera mounted above the mirror at the focus captures 22 arcminute wide strips of sky.

Why Is This A Big Moment For Astronomy In India?

The Devasthal observatory is outfitted with India's largest aperture telescope, which will classify objects in the sky using Big Data and Artificial Intelligence/Machine Learning (AI/ML) algorithms. The telescope's data will be quickly analysed using AI and machine learning to catalogue the objects in the sky, including variable and transient stellar sources.

Supernovae, gravitational lenses, space debris, and asteroids are all examples of transient or variable celestial objects that ILMT is designed to detect. The data collected from the ILMT over a five-year operational period will be ideal for performing a deep photometric and astrometric variability survey.

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