swap_horiz ACE 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

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

9.4 Excellent

4

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

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

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

7

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

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

8.8 Great

9

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

8.6 Great

10

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

8.4 Great

11

Deep Space Climate Observatory (DSCOVR)

The Deep Space Climate Observatory (DSCOVR) is a space weather and Earth observation satellite launched in 2015 through...

2015 Solar Wind L1 Nasa Noaa

8.4 Great

12

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

8.2 Great

13

GRACE-FO

GRACE-FO, the Gravity Recovery and Climate Experiment Follow-On, is a joint NASA and German Research Centre for Geoscien...

Active Nasa Gravity Earth

8.2 Great

14

MAVEN

MAVEN, short for Mars Atmosphere and Volatile Evolution, is a NASA orbiter launched in 2013 and placed into orbit around...

Active Nasa Mars Atmosphere

8.2 Great

15

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

8.1 Great

16

MMS

The Magnetospheric Multiscale (MMS) mission is a NASA space mission launched in 2015 to study the Earth's magnetosphere....

Active Nasa Plasma Magnetosphere

7.9 Good

17

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

7.6 Good

18

TIMED

TIMED (Thermosphere, Ionosphere, Mesosphere, Energetics, and Dynamics) is a NASA heliophysics mission launched in 2001 t...

Active Nasa Atmosphere Earth

7.3 Good

19

Aditya-L1

Aditya-L1 is the Indian Space Research Organisation's first space-based solar observatory. Launched in 2023, it was inse...

Solar Active Heliophysics Isro

7.2 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

7.0 Good