The detector, known as the Jiangmen Underground Neutrino Observatory, or JUNO, is located in China.

• The observatory is situated 700 meters underground. 
  • Most of the neutrino observatories are underground, as the physical bulk of the Earth’s crust helps block most other interfering particles, like muons (elementary subatomic particles similar to the electron).
• Main goals of the JUNO
  • Mass Hierarchy: To determine the hierarchy of masses between the three neutrino types.
    • The three neutrino types are Electron neutrino, Muon neutrino, and Tau neutrino, each linked to their respective particles.
  • Oscillation Frequency: To measure the frequency of neutrino oscillation (how often the neutrino types shift, or change, from one type to another).

About Neutrinos

• Nature: Subatomic particles (often called ghost particles) that have zero electrical charge, zero size and tiny mass.
• Occurrence: Second-most abundant particle after photons (particles of light) and most abundant among particles found in the universe. 
• Detectability: Difficult to detect as they only interact with matter via weak nuclear force and gravity.
• Features: Undisturbed by even the strongest magnetic field, Travel in straight lines from their source, Travel at nearly the speed of light, etc.