Coronal Explosion

What is Coronal explosion?

  • Coronal explosion is an unusually large release of plasma and magnetic field from the solar corona.

  • They often follow solar flares and are normally present during a solar prominence eruption.

  • The plasma is released into the solar wind, and can be observed in coronagraph imagery.

About the Proxima Centauri:

  • It is group of stars which hosts an Earth-like habitable planet — Proxima Centaur b — orbiting within (Proxima Centauri) its habitable zone.

  • It was discovered in 2016.

  • It is a cool dwarf star located around 4.25 light years away from the Earth.

  • Because of Proxima Centauri’s proximity to Earth, its angular diameter can be measured directly. It is about one-seventh the diameter of the Sun.


  • ASTROSAT is India’s first dedicated multi-wavelength space observatory.

  • It was launched on a PSLV-XL on 28 September 2015.

  • It was built by a consortium of institutes across India led by ISRO Satellite Centre, TIFR Mumbai, IIA Bengaluru, Vikram Sarabhai Space Centre, Inter-University Centre for Astronomy and Astrophysics, and Space Applications Centre in collaboration with University of Leicester (UK) and the Canadian Space Agency.

  • One of the unique features of ASTROSAT mission is that enables the simultaneous multi-wavelength observations of various astronomical objects with a single satellite.

The scientific objectives of ASTROSAT mission are:

  • To understand high energy processes in binary star systems containing neutron stars and black holes

  • Estimate magnetic fields of neutron stars

  • Study star birth regions and high energy processes in star systems lying beyond our galaxy

  • Detect new briefly bright X-ray sources in the sky

  • Perform a limited deep field survey of the Universe in the Ultraviolet region

About Chandra:

  • The Chandra programme is managed by NASA’s Marshall Space Flight Center.

  • The flight operations and the Chandra Science are controlled by the Smithsonian Astrophysics Observatory in Cambridge, Massachusetts.

About the Hubble Space Telescope:

  • The Hubble Space Telescope is a space telescope that was launched into low Earth orbit in 1990 and remains in operation.

  • It is one of the largest and most versatile space telescopes, and is well known as both a vital research tool and a public relations boon for astronomy.

Source:Indian Express

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