NASA's Juno Spacecraft Has Detected FM Radio Signals From Jupiter.
                     NASA's Juno 
Spacecraft Has 
Detected FM 
Radio Signals 
From Jupiter
Introduction
• In a recent development to its deep space 
exploration, NASA has managed to catch FM 
signals from one of Jupiter’s moons. 
• The signals were picked up by the renowned 
NASA spacecraft Juno while orbiting Jupiter.
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FM waves
• The FM waves were detected from 
Ganymede, one of the gas giant’s 79 moons. 
• Interestingly, this is the first time that any 
signal or activity has ever been detected 
from this particular moon. 
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Proof for alien 
life
• Although it must be noted that the radio 
waves in this case do not exactly originate 
from any communication device and hence, 
should not be taken as a proof for alien life.
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Electromagnetic Radiation
• The waves instead are being generated due 
to a natural space phenomena called 
electronic- cyclotron maser (ECM) instability. 
• The process takes place in electromagnetic 
fields and directly amplifies electromagnetic 
radiation. 
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How the Electromagnetic 
Radiation generate?
• This happens through the nonthermal 
energetic electrons trapped in magnetic 
fields, oscillating much slower than their spin 
rate.
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Jupiter
• Juno was able to pick up this amplified 
frequency while moving through a region of 
Jupiter where the planet’s magnetic field 
lines aligned with the Ganymede moon. 
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Ganymede
• As per NASA, Ganymede is also the only 
natural satellite in the solar system that has 
its own magnetic field. 
• Scientists had thus long speculated such 
radio waves to persist in the region but had 
not observed it firsthand until now.
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New Frontiers Program
• In 2011, NASA sent a space probe named 
JUNO out into space. 
• It was a part of NASA’s “New Frontiers 
Program.” The program consists of a series of 
missions where NASA aims to explore our 
entire solar system and strengthen our 
understanding of space.
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Discover
• The probe was aimed towards Jupiter in order 
to study the planet and discover more about 
how it was formed or how it evolved over 
time. It entered Jupiter’s orbit in 2016.
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Jupiter's gravity
• According to the official website, Juno has 
some state of the art technology aboard and 
it will observe Jupiter's gravity and magnetic 
fields, atmospheric dynamics and 
composition, and evolution.
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Source: www.news18.com