Why in the news ?
Recently, researchers from Mumbai, Kochi, and Japan used the GRAPES-3 (Gamma Ray Astronomy PeV Energies Phase-3) telescope to study how the temperature of Earth's upper atmosphere and the Sun's magnetic field affect muons, subatomic particles arriving from space.
What is the GRAPES-3 Telescope ?
- GRAPES-3 is an advanced astronomical observatory developed to study the origin, acceleration, and propagation of cosmic rays.
Key Features
- Full name: Gamma Ray Astronomy PeV Energies Phase-3 (GRAPES-3)
- It studies high-energy cosmic rays and gamma rays entering the Earth's atmosphere.
- It also analyzes solar activity and geomagnetic storms through cosmic ray muons.
- It is equipped with an array of plastic scintillator detectors and a large-area muon detector.
- Location: Ooty (Tamil Nadu)
- Operation: Tata Institute of Fundamental Research
What are muons ?
- Muons are subatomic particles similar to electrons but with greater mass.
- They are produced when cosmic rays collide with Earth's atmosphere.
- Muons can travel at nearly the speed of light and reach Earth's surface.
What are cosmic rays ?
- Cosmic rays are highly energetic charged particles that travel towards Earth from outer space.
Key Facts
- They were discovered more than 100 years ago.
- They are considered among the most energetic particles in the universe.
- They enter Earth's atmosphere and produce a particle shower.
- This shower includes particles such as electrons, photons, protons, neutrons, and muons.
- Their energy range is approximately 10⁸ eV to 10²⁰ eV.
- They reach Earth continuously from almost all directions.
Significance of the Study
- Helps understand the relationship between Earth's atmosphere and space weather.
- Improves assessment of the impacts of solar activity on Earth.
- Contributes to understanding the nature of cosmic rays and cosmic phenomena.
- Provides a vital research base in the fields of space science and astrophysics.
Conclusion
The GRAPES-3 telescope is an important astronomical research project in India, playing a key role in the study of cosmic rays, muons, and space weather phenomena. This helps to better understand cosmic processes, solar activity, and their impacts on Earth's atmosphere.
