×

UPSC Courses

DNA banner

DAILY NEWS ANALYSIS

  • 13 December, 2022

  • 5 Min Read

Binary Merger Of Gamma-Ray Burst with Kilonova

Binary Merger Of Gamma-Ray Burst with Kilonova

  • A long Gamma Ray Burst (GRB) produced by a compact binary merger twinned with kilonova emissions was recently reported as a rare astronomical event.
  • The Devasthal Optical Telescope (DOT), India's largest optical telescope, also confirmed this combination, which had never before been accepted or proven scientifically.
  • The GRB, designated as GRB211211A, lasted for more than 50 seconds.
  • Kilonovae are produced by the collision of two compact objects, such as binary neutron stars or neutron stars and black holes.

How do Gamma-Ray Bursts (GRB) work?

  • GRBs are short, high-energy gamma radiations that are released when massive stars in the universe collapse or die. They are massive but incredibly bright.
  • They are the most potent cosmic events, and they can be seen from billions of light-years away.
  • A light-year, or 9.5 trillion kilometres, is the distance a light beam covers in one year on Earth.
  • Based on whether the event lasts longer than or less than two seconds, astronomers categorise them as long or short.

Long Gamma-Ray Bursts (GRBs):

  • These bursts are seen in connection with the death of large stars.
  • A black hole is created when the core of a star many times more massive than the Sun abruptly collapses due to fuel exhaustion.
  • A black hole is a region in space where the matter has been compressed to such an extent that it has produced a gravitational field from which even light cannot escape.
  • Some of the matter that is swirling toward the black hole escapes as two strong jets that travel in opposite directions at nearly the speed of light.
  • Only when one of these jets happens to be almost directly pointed at Earth can astronomers detect a GRB.
  • Each jet pierces the star, sending out a pulse of gamma rays, the light with the highest energy, that can last for several minutes. The star that was damaged by the burst then rapidly expands as a supernova.
  • An exploding star that has reached the end of its life is known as a supernova.

Short Gamma-Ray Bursts (GRB):

  • Contrarily, a short GRB is created when two compact objects, like neutron stars, which are also created during stellar collapse, spiral inward over a period of billions of years and collide.
  • One of the potential evolutionary endpoints for high mass stars is a neutron star.

Source: The Indian Express


Anti-Defection Law in India

The Supreme Court of India recently gave a final three-week deadline to the Telangana Assembly Speaker to decide pending disqualification petitions against defecting MLAs under the Anti-Defection Law. What is the Anti-Defection Law? The Anti-Defection Law was introduced through the 52nd Amendment (1985), which added the Tenth Schedule to the

Rat-Hole Mining

A major disaster unfolded in East Jaintia Hills, Meghalaya, when at least 18 workers died following an explosion in an illegally operating rat-hole coal mine. This incident highlights the continued prevalence of rat-hole mining despite bans imposed by the National Green Tribunal (NGT) and the Supreme Court of India. Rat-hole mining is driven

India’s Aviation Sector

India’s aviation sector has grown rapidly, becoming a major economic success story. However, regulatory oversight has not evolved at the same pace. Data-driven monitoring of fares and market behavior is essential to ensure fair competition, prevent market abuse, and shift from reactive crisis management to proactive regulation. Challen

Federalism in India

Recently, a high-level committee on Union–State relations submitted its first report to the Government of Tamil Nadu. The report examines the distribution of powers and responsibilities between the Union and the States, highlighting ongoing debates regarding the balance between central authority and state autonomy. This discussion is clos

India–UAE Economic Partnership

The relationship between India and the United Arab Emirates has evolved from a traditional energy-based partnership into a comprehensive economic and strategic relationship. Over the years, strong political trust, growing trade, and expanding investments have transformed bilateral ties into a diversified economic corridor. The economic partnership

DNA

22 Mar,2026

Toppers

Search By Date

Newsletter Subscription
SMS Alerts

Important Links

UPSC GS Mains Crash Course - RAW