Aditya-L1 Solar Mission Creates First Sun Velocity Maps
Indian scientists using the Aditya-L1 solar mission have mapped moving plasma storms on the Sun for the very first time using the Doppler effect.
Have you ever looked up at the sky and wondered what secret dances are happening around our giant, glowing Sun? On 20 October 2026, brilliant Indian scientists at the Indian Institute of Astrophysics (IIA) in Bengaluru shared some thrilling news about the Aditya-L1 solar mission.
Using a special telescope aboard Aditya-L1, India’s maiden solar space observatory, the team successfully created the world’s first Doppler velocity images of dynamic events dancing in the Sun’s corona. Aditya-L1 is floating way out in space at the Sun–Earth Lagrange Point 1 (L1), about 1.5 million kilometres away from Earth, giving our scientists a wonderful, uninterrupted view of our nearest star!
What happened?
The Sun’s corona is its hot outer atmosphere, and it is full of wild, stormy activity. To capture how fast this superheated gas, called plasma, is moving, scientists used an instrument called the Visible Emission Line Coronagraph (VELC). Dr. V. Muthupriyal, a Senior Project Scientist on the VELC operations team, worked with her colleagues to build a clever computer data-processing pipeline.
This smart pipeline turned raw space measurements into colourful velocity maps by using a physics idea called the Doppler effect. You may have already noticed the Doppler effect when a train rushes past you blowing its horn. As the train speeds towards you, the sound pitch gets higher, and as it chugs away, the pitch drops lower.
Light waves behave in a very similar way! When hot solar plasma moves towards the Aditya-L1 spacecraft, the light waves shift, which scientists record as a negative Doppler velocity. When the glowing plasma rushes away from the spacecraft, the light shifts the other way, showing a positive Doppler velocity.
To build these unique pictures, the team carefully studied spectroscopic data centred on the green Fe XIV (ionized iron) emission line at 5,303 Ångströms. According to Prof. R. Ramesh, the Principal Investigator of VELC, this instrument is currently the only space tool in the whole world that can make this kind of velocity map for the solar corona. Their exciting scientific achievement was published in The Astrophysical Journal.
Why does it matter to you?
You might wonder why we need to track storms happening millions of kilometres away in deep space. Sometimes, the Sun blasts out gigantic clouds of magnetic plasma called coronal mass ejections, or CMEs. These solar storms can travel straight down the line connecting the Sun and Earth.
Before this breakthrough, scientists could not easily track how fast these storms were travelling directly along that Sun–Earth path. Now, Aditya-L1 gives us tracking data that was previously unavailable to space researchers.
Tracking these space weather events in real time is very important for our daily lives here in India! When strong CMEs reach Earth, they can trigger geomagnetic storms. These storms can disrupt satellites that beam your favourite television programmes, scramble GPS signals that help your school bus navigate, disturb internet connections, and even affect electrical power grids on the ground.
By keeping a close eye on the Sun, our scientists can forecast space weather and help protect these vital systems. It also shows how a simple physics idea learned in school can help solve giant mysteries in the solar system!
Words to know
- Corona: The faint, super-hot outer atmosphere of the Sun.
- Lagrange Point 1 (L1): A special position in space, 1.5 million kilometres from Earth, where a spacecraft can orbit with an unbroken view of the Sun.
- Doppler effect: The change in pitch of sound or shift in light waves that happens when an object moves closer to or farther from an observer.
- Coronal Mass Ejections (CMEs): Huge bursts of solar plasma and magnetic fields fired out into space from the Sun.
- Plasma: A super-hot state of matter made of charged particles, often found inside stars.
Did you know?
Aditya-L1 is stationed at Lagrange Point 1, which is about four times farther away from Earth than the Moon!
Think about it
If you were a space scientist operating Aditya-L1, what solar mystery would you want to investigate next? How do you think space weather forecasts might help people living on Earth in the future?
Quick quiz
What does a negative Doppler velocity indicate in the new solar images?
- Plasma moving towards the observer
- Plasma standing completely still
- Plasma moving away from the observer
See the answer
Plasma moving towards the observer
Sources
This story was prepared by the Kids Gazette news desk with the help of AI research and writing tools, using the sources listed above.
