swap_horiz STEREO Alternatives

1

Cassini-Huygens

The Cassini-Huygens mission, operated by NASA and ESA, was a space-based observatory dedicated to studying Saturn and it...

Decommissioned Nasa Planetary Space Based

9.8 Brilliant

2

Gaia

The Gaia observatory is a space-based mission operated by the European Space Agency. It meticulously surveys our galaxy,...

Survey Optical Space Based Astrometry

9.7 Brilliant

3

Kepler Space Telescope

The Kepler Space Telescope was a NASA observatory launched in 2009. It monitored over 150,000 stars for dips in brightne...

Decommissioned Optical Nasa Space Based

9.6 Brilliant

4

Parker Solar Probe

The Parker Solar Probe is a NASA observatory spacecraft investigating the Sun’s outer atmosphere, the corona. Launched i...

Solar Nasa Space Based Heliophysics

9.6 Brilliant

5

Hipparcos

Hipparcos was a European Space Agency observatory launched in 1989. It performed groundbreaking measurements of stellar...

Parallax Decommissioned Space Based Astrometry

9.4 Excellent

6

Galileo spacecraft

The Galileo spacecraft was a NASA observatory designed for planetary exploration of Jupiter and its moons. Launched in 1...

Decommissioned Nasa Planetary Jupiter

9.4 Excellent

7

SOHO

SOHO is a space-based observatory operated jointly by NASA and the European Space Agency. It monitors the Sun’s activity...

Solar Nasa Space Based Esa

9.3 Excellent

8

Spitzer Space Telescope

The Spitzer Space Telescope was a NASA space-based observatory operating from 2003 to 2020. It utilized infrared light t...

Survey Decommissioned Nasa Infrared

9.2 Excellent

9

Fermi Gamma-ray Space Telescope

The Fermi Gamma-ray Space Telescope is a NASA observatory orbiting Earth. It detects high-energy gamma rays, providing i...

Survey High Energy Nasa Space Based

9.1 Excellent

10

Solar Dynamics Observatory

The Solar Dynamics Observatory (SDO) is a space-based observatory operated by NASA. It provides continuous ultraviolet i...

Solar Nasa Space Based Heliophysics

9.1 Excellent

11

Neil Gehrels Swift Observatory

The Neil Gehrels Swift Observatory is a NASA spacecraft dedicated to studying high-energy astrophysical events. Launched...

Nasa Space Based Gamma Ray X Ray

9.0 Excellent

12

WISE

The Wide-field Infrared Survey Explorer (WISE), launched by NASA in 2009, is a space telescope that completed an astrono...

Survey All Sky Nasa Infrared

8.8 Great

13

Roman Space Telescope

The Nancy Grace Roman Space Telescope is a NASA infrared observatory scheduled for launch in 2027 to study dark energy a...

Survey Optical Nasa Infrared

8.8 Great

14

Uhuru

Uhuru, launched by NASA in 1970, was the first dedicated X-ray astronomy satellite and successfully conducted the first...

Historical Nasa Space Based X Ray

8.6 Great

15

NuSTAR

The Nuclear Spectroscopic Telescope Array (NuSTAR), launched by NASA in 2012, is the first space telescope capable of fo...

High Energy Nasa Space Based Hard X Ray

8.5 Great

16

Einstein Observatory

The Einstein Observatory was a NASA X-ray telescope launched in 1978 that became the first imaging X-ray telescope to be...

Historical Nasa Space Based X Ray

8.5 Great

17

XRISM

XRISM is a JAXA and NASA X-ray astronomy satellite launched in 2023, designed to measure extreme high-energy phenomena u...

Nasa Space Based Spectroscopy X Ray

8.5 Great

18

Hinode

Hinode, meaning sunrise, is a solar observation satellite launched by JAXA in 2006 to study the Sun's magnetic fields an...

Solar Space Based X Ray Esa

8.4 Great

19

RXTE

The Rossi X-ray Timing Explorer was a NASA satellite launched in 1995 to observe variability in X-ray emissions from bla...

Decommissioned Nasa Space Based Timing

8.4 Great

20

IXPE

The Imaging X-ray Polarimetry Explorer is a NASA astrophysics satellite launched in 2021, notable for being the first de...

Nasa Space Based X Ray Esa

8.2 Great