swap_horiz Hera 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

Hayabusa2

The Hayabusa2 mission, developed by JAXA, successfully collected and returned samples from the asteroid Ryugu. This acti...

Active Asteroid Jaxa Sample Return

9.3 Excellent

6

OSIRIS-REx

The OSIRIS-REx spacecraft undertook a NASA mission to study the asteroid Bennu. Launched in 2016, it successfully collec...

Nasa Past Asteroid Sample Return

9.3 Excellent

7

DART

NASA’s DART mission successfully impacted the asteroid Dimorphos in October 2022. This marked the first demonstration of...

Impact Nasa Past Asteroid

8.9 Great

8

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

9

Sentinel-2A

Sentinel-2A is an ESA Copernicus optical satellite launched in 2015, using a 13-band multispectral imager to monitor lan...

Imaging Active Earth Esa

8.6 Great

10

Mars Express

Mars Express is an ESA orbiter launched in 2003 and ESA's first Mars mission, mapping the planet and probing subsurface...

Active Planetary Mars Orbiter

8.4 Great

11

Sentinel-3A

Sentinel-3A is an ESA Copernicus satellite launched in 2016 to monitor oceans, land, ice, and atmosphere for climate and...

Ocean Active Earth Esa

8.1 Great

12

Sentinel-5P

Sentinel-5P is an ESA Copernicus atmosphere satellite launched in 2017, notable for the Tropomi instrument that maps tra...

Active Atmosphere Earth Esa

8.0 Great

13

ExoMars Trace Gas Orbiter

ExoMars Trace Gas Orbiter is a 2016 ESA-Roscosmos Mars orbiter that studies trace gases such as methane and relays surfa...

Active Mars Orbiter Esa

7.7 Good

14

Cheops

Cheops is an ESA space telescope launched in 2019 with Swiss leadership, built to measure the sizes of known exoplanets...

Survey Telescope Active Exoplanets

7.3 Good

15

EarthCARE

EarthCARE is an ESA-JAXA Earth Explorer satellite launched in 2024 to measure clouds, aerosols, and radiation with four...

Active Earth Esa Jaxa

7.2 Good

16

OSIRIS-APEX

OSIRIS-APEX is NASA's extended OSIRIS-REx mission, sent after the 2023 Bennu sample return to study asteroid Apophis aft...

Active Nasa Extended Asteroid

7.2 Good

17

BepiColombo

BepiColombo is an ESA-JAXA Mercury mission launched in 2018, carrying two orbiters scheduled to begin science operations...

Active Mercury Orbiter Esa

7.1 Good

18

Psyche

Psyche is a NASA mission launched in 2023 to visit 16 Psyche, a metal-rich asteroid that may expose material from an ear...

Active Nasa Asteroid Orbiter

7.0 Good

19

Biomass

Biomass is an ESA Earth Explorer satellite launched in 2025, notable for carrying the first P-band synthetic aperture ra...

Active Radar Forest Earth

6.9 Fair

20

Tianwen-2

Tianwen-2 is China's 2025 asteroid sample-return mission to Kamo'oalewa, designed to return material before continuing t...

China Active Comet Asteroid

6.7 Fair