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Exploring India's Aditya L1 Mission: A Sun-Kissed Odyssey

Dive into a journey beyond the moon & towards the scorching sun

By Apurva KeniPublished 5 months ago 4 min read

Exploring India's Aditya L1 Mission: A Sun-Kissed Odyssey

It's been less than two weeks since we celebrated the monumental success of Chandrayaan 3, but guess what? ISRO (Indian Space Research Organisation) is already gearing up to make history once again with the Aditya L1 mission. Hold on to your seats as we dive into this extraordinary journey beyond the moon and toward the scorching sun.

Aditya L1: India's Sun-Centric Mission

While Chandrayaan explored the moon, Aditya L1 has its sights set on our closest star - the sun! However, don't expect it to touch down on the sun's surface. Instead, Aditya L1 will observe the sun from a safe distance, closer to Earth than the sun itself. It'll orbit around the Lagrange point L1, located 1.5 million km away from Earth, for an incredible five-year mission. So, it's not just a spacecraft; it's a space observatory!

Unveiling the Mysteries of Lagrange Points

Before we delve into Aditya L1's mission, let's get cozy with the concept of Lagrange points. Picture this: the gravitational forces of the Earth and the Sun balance out at these unique points in space. They create stability, allowing spacecraft to conserve fuel and stay in position for extended missions. Lagrange Point L1, where Aditya L1 will reside, offers continuous observation of both the Earth and the sun, without the pesky shadows getting in the way.

Aditya L1: Continuing a Legacy

Aditya L1 isn't the first solar observatory out there. Other space agencies, like NASA and the European Space Agency, have explored these Lagrange points with missions like the Solar and Heliospheric Observatory (SOHO). L1 and L2 are the prime Lagrange points because of their proximity to Earth. In fact, the renowned James Webb Space Telescope is stationed at L2 to shield itself from the sun's interference.

What's on Aditya L1's Sun-Struck Agenda?

Now, let's shift our gaze to the sun itself. The sun is a behemoth compared to our humble Earth, with a diameter 109 times larger and a weight 333,000 times greater. It's a fiery ball of gas and plasma with multiple layers, including the scorching core where nuclear fusion generates sunlight and heat. However, the sun's core remains a mystery, with temperatures soaring up to 15 million degrees Celsius.

The Solar Layers Unveiled

Beyond the core, we have the radiative zone, the convective zone, and the Photosphere, which is akin to the sun's surface. But remember, the sun doesn't have a solid surface like Earth. Moving outward, there's the Chromosphere, the Transition Region, and the scalding-hot Corona, which reaches temperatures of 1-3 million degrees Celsius. The intriguing part is why the core is incredibly hot, while the surface cools down before heating up again in the Corona layer. It's a puzzler that scientists hope Aditya L1 can help solve.

Instruments Aboard Aditya L1

How does Aditya L1 plan to carry out its mission millions of kilometers away from the sun? Well, it's armed with seven specialized instruments, or payloads:

1. VELC (Visible Emission Line Coronagraph): This one studies the Corona layer and observes Coronal Mass Ejections.

2. SUIT (Solar Ultraviolet Imaging Telescope): SUIT captures images of the Sun's photosphere and chromosphere in the ultraviolet spectrum.

3. SOLEXS (Solar Low Energy X-ray Spectrometer): SOLEXS and HEL1OS (High Energy L1 Orbiting X-ray Spectrometer) examine X-rays emitted during solar flares.

4. ASPEX (Aditya Solar Wind Particle Experiment) and PAPA (Plasma Analyzer Package for Aditya): These two delve into the mysteries of the solar wind.

5. MAG (Magnetometer): MAG measures magnetic fields at the L1 point.

Four out of these seven payloads directly study the sun, while the remaining three gather crucial data around the L1 point.

Sun Science Beyond Aditya L1

Aditya L1 isn't the only mission to unlock the sun's secrets. NASA's Parker Solar Probe, launched in 2018, aims to make direct contact with the sun's Corona layer. Additionally, there's the Solar Orbiter, a joint effort by NASA and ESA, launched in 2020, to better understand the sun and its potentially harmful rays.


So there you have it, folks! Aditya L1 is embarking on a historic mission to study our blazing sun like never before. With its cutting-edge instruments and the vantage point of Lagrange Point L1, it's poised to unravel the sun's deepest mysteries. As we await the findings, let's remember that the quest for knowledge and exploration is what drives humanity forward.


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  • Alex H Mittelman 5 months ago

    Very interesting!

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