swap_horiz STEREO-A Alternatives

1

Explorer 1

Explorer 1 was the first artificial satellite successfully placed in Earth orbit by the United States. Launched in 1958,...

Cold War Satellite Nasa Earth Orbit

9.2 Excellent

2

Apollo Lunar Module

The Apollo Lunar Module was a specialized spacecraft developed by NASA to enable crewed landings on the Moon. This two-s...

Cold War Nasa Moon Crewed

9.2 Excellent

3

Opportunity rover

The Opportunity rover was a NASA spacecraft designed to explore the Martian surface. Launched in 2004 as part of the Mar...

Endurance Nasa Mars Rover

9.2 Excellent

4

Curiosity rover

The Curiosity rover is a NASA spacecraft exploring Mars. Launched in November 2011, it landed in Gale Crater in August 2...

Nasa Mars Rover Current

9.2 Excellent

5

Ingenuity helicopter

The Ingenuity helicopter is a rotorcraft developed by NASA for exploration on Mars. It represents a groundbreaking achie...

Helicopter Nasa Mars First Flight

9.2 Excellent

6

Cassini

The Cassini spacecraft was a joint NASA/ESA/ASI mission that orbited Saturn from 2004 to 2017. It provided unprecedented...

Science Flagship Nasa Saturn

9.2 Excellent

7

Huygens probe

The Huygens probe was an ESA-designed lander carried by the Cassini spacecraft. It achieved a historic touchdown on Tita...

Science Titan Lander Atmosphere

9.2 Excellent

8

SDO (Solar Dynamics Observatory)

NASA Solar Dynamics Observatory launched in 2010 that continuously observes the Sun in multiple extreme-ultraviolet wave...

Solar Nasa Observatory Current

8.7 Great

9

ISEE-3 / ICE

NASA spacecraft launched in 1978 as the first stationed at a Sun-Earth Lagrange point; repurposed as ICE, it flew throug...

Science Nasa Comet Probe

8.5 Great

10

MMS (Magnetospheric Multiscale Mission)

NASA's Magnetospheric Multiscale Mission, launched in 2015, uses four identical spacecraft flying in close formation to...

Nasa Current Magnetosphere Probe

8.3 Great

11

ACE (Advanced Composition Explorer)

NASA's Advanced Composition Explorer, launched in 1997 to the L1 Lagrange point, samples solar wind particles and measur...

Science Nasa Solar Wind L1

8.2 Great

12

GRAIL Ebb

One of NASA's twin GRAIL spacecraft launched in 2011 to map the Moon's gravitational field in finer detail than any prev...

Science Nasa Gravity Moon

8.1 Great

13

GRAIL Flow

The second of NASA's twin GRAIL spacecraft that together with Ebb produced the highest-resolution gravitational map of t...

Science Nasa Gravity Moon

8.1 Great

14

Wind spacecraft

A NASA spacecraft launched in 1994 and stationed near the L1 Lagrange point to study solar wind properties and their int...

Science Nasa Solar Wind L1

8.1 Great

15

OAO-2

NASA Orbiting Astronomical Observatory 2, launched in 1968, the first successful space-based ultraviolet telescope, prov...

Cold War Science Nasa Observatory

7.8 Good

16

IRIS (Interface Region Imaging Spectrograph)

NASA Interface Region Imaging Spectrograph launched in 2013 to study the solar chromosphere and transition region, helpi...

Nasa Observatory Current Sun

7.7 Good

17

Solar Maximum Mission

NASA spacecraft launched in 1980 to study solar flares at solar maximum; it was notably repaired in orbit by Space Shutt...

Solar Nasa Observatory Sun

7.7 Good

18

Psyche spacecraft

NASA spacecraft launched in October 2023 en route to 16 Psyche, a metal-rich asteroid in the main belt thought to be a r...

Science Nasa Current Orbiter

7.3 Good

19

STEREO-B

One of two NASA spacecraft launched in 2006 for stereoscopic solar observation; contact was lost in 2014 and briefly res...

Nasa Sun Probe Stereo Imaging

6.8 Fair

20

CONTOUR

NASA Comet Nucleus Tour spacecraft launched in 2002 that was lost shortly after its departure burn from Earth orbit due...

Science Nasa Comet Probe

3.1 Poor