swap_horiz IBEX Alternatives

1

Mariner 9

NASA's Mariner 9 became the first spacecraft to enter orbit around another planet when it reached Mars in 1971. Its work...

Mapping Nasa Mars Orbiter

9.20 Excellent

2

Voyager 2

Voyager 2 is a NASA-built spacecraft deployed in 1977. It’s notable for being the first to explore Uranus and Neptune pr...

Active Nasa Interstellar Outer Planets

9.15 Excellent

3

Voyager 1

Voyager 1 is an active NASA spacecraft launched in 1977. It undertook a flyby mission to Jupiter and Saturn. The probe a...

Active Nasa Interstellar Outer Planets

9.13 Excellent

4

New Horizons

The New Horizons mission is an active NASA space probe studying the outer solar system. Launched in 2006, it achieved a...

Active Nasa Kuiper Belt Pluto

8.68 Great

5

Curiosity Mars Rover

The Curiosity rover is an active NASA mission exploring Mars from Gale Crater. Launched in 2011, it investigates the pla...

Geology Active Nasa Mars

8.59 Great

6

Perseverance Mars Rover

The Perseverance rover is an active NASA mission exploring Mars. It operates within Jezero Crater, analyzing the geology...

Active Nasa Mars Rover

8.48 Great

7

Lunar Reconnaissance Orbiter

The Lunar Reconnaissance Orbiter (LRO) is a NASA spacecraft currently orbiting the Moon. Launched in 2009, it provides d...

Mapping Active Nasa Moon

8.30 Great

8

Mars Reconnaissance Orbiter

The Mars Reconnaissance Orbiter is a NASA spacecraft orbiting Mars since 2006. It provides high-resolution imaging of th...

Imaging Active Nasa Mars

8.11 Great

9

Lunar Orbiter 1

The Lunar Orbiter 1 mission involved a NASA spacecraft launched in 1966. It achieved the distinction of being the first...

Mapping Lunar Nasa Orbiter

8.07 Great

10

Landsat 8

Landsat 8 is an active Earth observation satellite operated by NASA and the USGS. This mission continues a decades-long...

Imaging Active Nasa Earth

8.05 Great

11

Mars Global Surveyor

Mars Global Surveyor (MGS) was an unmanned NASA spacecraft designed to map and study the surface and atmosphere of Mars....

Mapping Nasa Mars Past

7.95 Good

12

Solar Orbiter

Solar Orbiter is a spacecraft developed by the European Space Agency with NASA participation to study the Sun and the in...

Solar Active Nasa Orbiter

7.89 Good

13

Lunar Orbiter 2

Lunar Orbiter 2 was an uncrewed NASA spacecraft launched in 1966 as part of a program to photograph the Moon before the...

Mapping Lunar Nasa Orbiter

7.86 Good

14

ICESat-2

ICESat-2 (Ice, Cloud, and land Elevation Satellite 2) is an Earth observation satellite launched by NASA in 2018 as a fo...

Laser Active Nasa Ice

7.69 Good

15

ACE

The Advanced Composition Explorer (ACE) is a NASA space mission designed to study the composition of matter from the sol...

Active Nasa Solar Wind Heliophysics

7.64 Good

16

IMAP (Interstellar Mapping and Acceleration Probe)

The Interstellar Mapping and Acceleration Probe (IMAP) is a NASA heliophysics mission scheduled for launch in 2025. The...

2025 Nasa Solar Wind L1

7.60 Good

17

Lunar Orbiter 3

Lunar Orbiter 3 was a NASA spacecraft launched on February 5, 1967, as part of the five-mission Lunar Orbiter program de...

Mapping Lunar Nasa Orbiter

7.58 Good

18

Landsat 9

Launched in September 2021, Landsat 9 is an Earth observation satellite jointly managed by NASA and the U.S. Geological...

Imaging Active Nasa Earth

7.56 Good

19

2001 Mars Odyssey

2001 Mars Odyssey is a NASA spacecraft that entered orbit around Mars in 2001. Its instruments mapped the planet's surfa...

Mapping Active Nasa Mars

7.47 Good

20

IMAP

NASA's Interstellar Mapping and Acceleration Probe (IMAP) is an active space mission that studies the heliosphere, the v...

Mapping Active Nasa Solar Wind

6.39 Fair