This is a list of objects which have been, are or are planned to be at any of the five Sun-Earth Lagrangian points.

Contents

1 L1 1.1 Past objects 1.2 Present objects 1.3 Planned objects 1.4 Cancelled objects 2 L2 2.1 Present objects 2.2 Planned objects 2.3 Cancelled objects 3 L3 4 L4 4.1 Present objects 5 L5 5.1 Present objects

L1

L1 is the Lagrangian point located approximately 1,500,000 km towards the Sun away from the Earth.

Past objects

• ISEE-3
• Genesis
• WIND

Present objects

• The Solar and Heliospheric Observatory (SOHO-3)
• The Advanced Composition Explorer (ACE)

Planned objects

• LISA Pathfinder

Cancelled objects

• The Triana satellite

L2

L2 is the Lagrangian point located approximately 1,500,000 km away from the Earth in the direction opposite the Sun.

Present objects

• Wilkinson Microwave Anisotropy Probe (WMAP)

Planned objects

• The joint NASA, ESA and CSA James Webb Space Telescope (JWST), formerly known as the Next Generation Space Telescope (NGST)
• The ESA Herschel Space Observatory
• The ESA Planck Surveyor
• The ESA Gaia probe
• The NASA Terrestrial Planet Finder mission (may be placed in an Earth-trailing orbit instead)
• The ESA Darwin mission

Cancelled objects

• The ESA Eddington space telescope

L3

L3 is the Lagrangian point located on the side of the Sun opposite the Earth, slightly outside the Earth's orbit.

L4

L4 is the Lagrangian point located in the Earth's orbit 60° ahead of the Earth.

Present objects

• Dust clouds

L5

L5 is the Lagrangian point located in the Earth's orbit 60° behind the Earth.

Present objects

• Dust clouds