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PSP/SWEAP

EngineeringResearch
May 7, 2026
Sun | 2018-Present

The Solar Wind Electrons Alphas and Protons (SWEAP) investigation is the set of instruments on the Parker Solar Probe (PSP) spacecraft that directly measure the properties of the plasma in the solar atmosphere. 

Psyche

ResearchActive
Feb 27, 2026
Asteroid Belt | Launched 2023; Arrival 2029

Psyche is both the name of an asteroid orbiting the Sun between Mars and Jupiter — and the name of a NASA space mission to visit that asteroid. The Psyche spacecraft is targeted to travel…

RHESSI

OperationsResearchCompleted
Feb 27, 2026
Low Earth Orbit | 2002-2018

The Reuven Ramaty High Energy Solar Spectroscopic Imager was a NASA solar flare observatory. It was the first imaging mission to observe solar flares from soft X-rays to gamma rays.

S3-3

ResearchCompleted
Jul 20, 2026
Low-Earth orbit | 1976

S3-3 was a small observatory in a near-polar orbit with eight different sensors on board. It was designed to observe various magnetospheric parameters and their interrelationships. Sensors, which observed energetic protons and Alpha particles, also…

SALT-BVIT

Research
May 7, 2026
South Africa | 2009

The BVIT is a visible photon counting detector mounted on the 10m Southern African Large Telescope (SALT) that is designed to provide observers with very high time-resolution photometric imaging observations of astronomical objects. The instrument,…

Solar MURI

ResearchCompleted
Jun 30, 2026
Multiple institutions

Solar MURI was a collaborative project studying magnetic eruptions on the Sun and their effects on the Earth’s space environment. (“MURI” stands for Multidisciplinary University Research Initiative, a research program funded by DoD.) The aim…

SPEAR

EngineeringResearchCompleted
May 19, 2026
Low-earth space | 2003-2004

The FIMS-SPEAR experiment conducted the first large-area spectral imaging survey of the far-ultraviolet sky, a band that spans warm and hot plasma cooling lines, molecular hydrogen fluorescent emission, and dust-scattered starlight. Known in Korea as…

STAR

Research
May 5, 2026
Brookhaven National Laboratory

The primary physics objective of the Star Experiment At the Relativistic heavy ion collider (STAR) is to study the formation and characteristics of the quark-gluon plasma (QGP), a state of matter believed to exist at…

Stardust@Home

May 11, 2026
Various | 2006-Present

Stardust@Home Invited citizen scientists to participate in the search for evidence of interstellar dust in the aerogel and aluminum foil collectors returned by the Stardust mission in 2006. Volunteers used an online virtual microscope to search…

STEREO

EngineeringResearch
May 8, 2026
Solar orbit at 1AU | 2006-Present

STEREO (Solar TErrestrial RElations Observatory) was launched in 2006, employing two nearly identical space-based observatories – one ahead of Earth in its orbit, the other trailing behind – to provide the first-ever stereoscopic measurements to…