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

OSIRIS-REx (Bennu Sample Return)

OSIRIS-REx is a NASA spacecraft mission designed to travel to the near-Earth asteroid 101955 Bennu, collect a surface sa...

2023 Nasa Asteroid Earth Return

9.7 Brilliant

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

9.4 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

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

7

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

8

Sentinel-2A

Sentinel-2A is an Earth-observation satellite developed for the European Union's Copernicus program and operated by the...

Imaging Active Earth Esa

8.6 Great

9

Mars Express

Mars Express is a planetary exploration mission developed by the European Space Agency (ESA), launched in 2003 to study...

Active Planetary Mars Orbiter

8.4 Great

10

Sentinel-3A

Sentinel-3A is an Earth-observation satellite operated as part of the European Union's Copernicus program, with the Euro...

Ocean Active Earth Esa

8.1 Great

11

Sentinel-5P

Sentinel-5 Precursor (Sentinel-5P) is an environmental satellite operated by the European Space Agency (ESA) as part of...

Active Atmosphere Earth Esa

8.0 Great

12

ExoMars Trace Gas Orbiter

ExoMars Trace Gas Orbiter is a collaborative Mars mission launched in 2016 by the European Space Agency (ESA) and Roscos...

Active Mars Orbiter Esa

7.7 Good

13

Cheops

Cheops (Characterising Exoplanet Satellite) is a European Space Agency space telescope launched in December 2019, develo...

Survey Telescope Active Exoplanets

7.3 Good

14

EarthCARE

EarthCARE, short for Earth Cloud, Aerosol and Radiation Explorer, is a joint Earth-observation mission developed by the...

Active Earth Esa Jaxa

7.2 Good

15

OSIRIS-APEX

OSIRIS-APEX is NASA's extended mission for the spacecraft that returned a sample from asteroid Bennu in 2023 under the O...

Active Nasa Extended Asteroid

7.2 Good

16

BepiColombo

BepiColombo is a joint European Space Agency and Japan Aerospace Exploration Agency mission to study Mercury. Launched o...

Active Mercury Orbiter Esa

7.1 Good

17

Psyche

Psyche is a NASA robotic space mission to the asteroid 16 Psyche. The spacecraft is designed to orbit and study the meta...

Active Nasa Asteroid Orbiter

7.0 Good

18

Biomass

Biomass is an ESA Earth Explorer satellite mission launched on 29 April 2025 aboard a Vega-C rocket from French Guiana....

Active Radar Forest Earth

6.9 Fair

19

Tianwen-2

Tianwen-2 is a Chinese planetary exploration mission focused first on near-Earth asteroid 2016 HO3, also designated 4692...

China Active Comet Asteroid

6.7 Fair

20

AIM (Asteroid Impact Mission)

AIM, or Asteroid Impact Mission, was a proposed European Space Agency spacecraft for the Didymos binary asteroid system....

Binary Cancelled Asteroid Esa

3.9 Poor