---
title: "Lagrange Point L1: Sun-Earth Orbital Point | Model Diplomat"
description: "Lagrange Point L1 is the Sun-Earth gravitational balance point 1.5 million km from Earth, hosting Aditya-L1 and SOHO for uninterrupted solar observation."
url: "https://modeldiplomat.com/learn/glossary/lagrange-point-l1"
---

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Model Diplomat Research Team · Last reviewed June 22, 2026

TL;DR

- Lagrange Point L1 is the equilibrium point between two large bodies, such as the Sun and Earth, where their gravitational pulls balance a smaller object's orbital motion to keep it stationary relative to both.
- Why is Lagrange Point L1 located 1.5 million km from Earth and not farther?
- How does L1 differ from L2?
- Why is L1 important for space-weather forecasting?

[Civil Service & Diplomatic Exams](https://modeldiplomat.com/learn/civil-services/glossary)Updated June 22, 2026

Lagrange Point L1 is the equilibrium point between two large bodies, such as the Sun and Earth, where their gravitational pulls balance a smaller object's orbital motion to keep it stationary relative to both.

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## Timeline

1. 2 September 2023

   India's Aditya-L1, launched by ISRO on , reached its halo orbit around Sun-Earth L1 on 6 January 2024, becoming India's first dedicated solar observatory and…

2. 6 January 2024

   India's Aditya-L1, launched by ISRO on 2 September 2023, reached its halo orbit around Sun-Earth L1 on , becoming India's first dedicated solar observatory a…

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Example

On 6 January 2024, the Indian Space Research Organisation inserted Aditya-L1 into a halo orbit around the Sun-Earth Lagrange Point L1, 1.5 million km from Earth, establishing India's first dedicated solar observatory.

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