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Topic 269 · Science, Technology & Space

Aditya-L1 and Proba-3 jointly map solar CMEs

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Revise the 12 points first Book 1 RATNA

Core Trigger: On 16 October 2026 ISRO reported the first joint analysis of coronal mass ejections by Aditya-L1 and Proba-3.
Events Studied: The study covered CMEs seen on 14 and 16 September 2025 and was published in Astronomy & Astrophysics.
Lead Team: Researchers at the Indian Institute of Astrophysics combined data from the two coronagraphs.
Key Finding: Mass and thermal energy estimates agreed well; magnetic energy was comparable to or larger than kinetic energy.
Instruments: Aditya-L1 carries VELC; ESA's Proba-3 carries ASPIICS, the Association of Spacecraft for Polarimetric and Imaging Investigation of the Corona of the Sun.
Stakeholders: ISRO and the European Space Agency; the Proba-3 formation-flying pair launched on PSLV in December 2024.
India Link: Aditya-L1 is India's first dedicated solar mission; its VELC data now complements European observations.
Location: Aditya-L1 sits at the Sun-Earth Lagrange point L1, about 1.5 million km from Earth.
Founded: Aditya-L1 was launched on 2 September 2023 from Sriharikota.
Landmark: The Carrington Event of 1859 is the strongest geomagnetic storm on record, caused by a solar eruption.
Duty: Article 51A(h) makes it a fundamental duty to develop scientific temper, humanism and the spirit of inquiry.
Definition: A coronal mass ejection is a huge expulsion of plasma and magnetic field from the Sun's corona.

Question 1 of 10

ISRO's first joint analysis of CMEs paired Aditya-L1 with which mission?

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Answer: (C) Proba-3

Core Trigger: On 16 October 2026 ISRO reported the first joint analysis of coronal mass ejections by Aditya-L1 and Proba-3.From Book 1 RATNA, topic 269, point 1

Question 2 of 10

In which journal was the joint CME study published?

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Answer: (D) Astronomy & Astrophysics

Events Studied: The study covered CMEs seen on 14 and 16 September 2025 and was published in Astronomy & Astrophysics.From Book 1 RATNA, topic 269, point 2

Question 3 of 10

Researchers of which institute combined data from the two coronagraphs?

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Answer: (A) Indian Institute of Astrophysics

Lead Team: Researchers at the Indian Institute of Astrophysics combined data from the two coronagraphs.From Book 1 RATNA, topic 269, point 3

Question 4 of 10

The study found CME magnetic energy comparable to or larger than which energy?

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Answer: (B) Kinetic energy

Key Finding: Mass and thermal energy estimates agreed well; magnetic energy was comparable to or larger than kinetic energy.From Book 1 RATNA, topic 269, point 4

Question 5 of 10

Which is/are correct? (1) Aditya-L1 carries ASPIICS. (2) ESA's Proba-3 carries ASPIICS.

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Answer: (B) Only 2

Instruments: Aditya-L1 carries VELC; ESA's Proba-3 carries ASPIICS, the Association of Spacecraft for Polarimetric and Imaging Investigation of the Corona of the Sun.From Book 1 RATNA, topic 269, point 5

Question 6 of 10

On which Indian rocket did the Proba-3 formation-flying pair launch in December 2024?

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Answer: (C) PSLV

Stakeholders: ISRO and the European Space Agency; the Proba-3 formation-flying pair launched on PSLV in December 2024.From Book 1 RATNA, topic 269, point 6

Question 7 of 10

How far from Earth is Aditya-L1's position at the Sun-Earth point L1?

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Answer: (D) About 1.5 million km

Location: Aditya-L1 sits at the Sun-Earth Lagrange point L1, about 1.5 million km from Earth.From Book 1 RATNA, topic 269, point 8

Question 8 of 10

On which date was Aditya-L1 launched from Sriharikota?

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Answer: (A) 2 September 2023

Founded: Aditya-L1 was launched on 2 September 2023 from Sriharikota.From Book 1 RATNA, topic 269, point 9

Question 9 of 10

Which 1859 event is the strongest geomagnetic storm on record?

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Answer: (B) Carrington Event

Landmark: The Carrington Event of 1859 is the strongest geomagnetic storm on record, caused by a solar eruption.From Book 1 RATNA, topic 269, point 10

Question 10 of 10

Which is/are correct? (1) Article 51A(h) makes developing scientific temper a fundamental duty. (2) A CME is a burst of X-rays from the Sun's core.

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Answer: (A) Only 1

Duty: Article 51A(h) makes it a fundamental duty to develop scientific temper, humanism and the spirit of inquiry.From Book 1 RATNA, topic 269, point 11

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