swap_horiz New Horizons Alternatives

1

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

10.0 Brilliant

2

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

9.9 Brilliant

3

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

9.3 Excellent

4

Pioneer 10

NASA’s Pioneer 10 is a historic space probe launched in 1972. It achieved several significant milestones including being...

Nasa Deep Space Jupiter Past

9.2 Excellent

5

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

9.2 Excellent

6

Pioneer 11

NASA’s Pioneer 11 is a historic space mission launched in 1973. It achieved the first-ever close flyby of Jupiter and su...

Nasa Jupiter Saturn Past

9.0 Excellent

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

9.0 Excellent

8

Mariner 4

The Mariner 4 mission, launched by NASA in 1964, represents a pivotal moment in planetary exploration. This flyby spacec...

Imaging Nasa Mars Flyby

9.0 Excellent

9

Mariner 2

The Mariner 2 spacecraft represents a pivotal moment in space exploration. Launched by NASA in 1962, it achieved the fir...

Nasa Past Venus Firsts

8.9 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

8.8 Great

11

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

8.8 Great

12

Solar Orbiter

Solar Orbiter is an ESA-NASA solar probe launched in 2020, notable for close solar passes and the first detailed views o...

Solar Active Nasa Orbiter

8.6 Great

13

Mariner 10

Mariner 10 was a NASA probe launched in 1973, the first mission to visit Mercury and the first to use a planetary gravit...

Nasa Past Mercury Venus

8.6 Great

14

ICESat-2

ICESat-2 is NASA's 2018 follow-on laser altimetry mission, notable for using ATLAS to measure ice elevation and sea ice...

Laser Active Nasa Ice

8.4 Great

15

ACE

ACE is NASA's 1997 Advanced Composition Explorer at Sun-Earth L1, notable for long-running solar wind and energetic part...

Active Nasa Solar Wind Heliophysics

8.3 Great

16

Landsat 9

Landsat 9 is the 2021 NASA-USGS land imaging satellite, notable for continuing the 50-year Landsat record with OLI-2 and...

Imaging Active Nasa Earth

8.2 Great

17

GRACE-FO

GRACE-FO is the 2018 NASA-GFZ follow-on twin mission, notable for continuing gravity mapping and testing laser inter-sat...

Active Nasa Gravity Earth

8.2 Great

18

MAVEN

MAVEN is a NASA Mars orbiter launched in 2013 to study the upper atmosphere and how solar wind stripped gases from the p...

Active Nasa Mars Atmosphere

8.2 Great

19

2001 Mars Odyssey

2001 Mars Odyssey is a NASA orbiter launched in 2001 that mapped Martian hydrogen, found evidence for water ice, and rel...

Mapping Active Nasa Mars

8.1 Great

20

Europa Clipper

Europa Clipper is a NASA mission launched in 2024 to study Jupiter's icy moon Europa through 49 planned flybys after arr...

Active Nasa Jupiter Europa

7.3 Good