swap_horiz Mars Observer Alternatives

1

Explorer 1

Explorer 1 was the first artificial satellite successfully placed in Earth orbit by the United States. Launched in 1958,...

Cold War Satellite Nasa Earth Orbit

9.2 Excellent

2

Mercury Friendship 7

The Mercury Friendship 7 was a single-seat capsule designed for crewed orbital missions during the Cold War. It carried...

Cold War Nasa First Us Orbit Crewed

9.2 Excellent

3

Apollo Command/Service Module

The Apollo Command/Service Module was a critical component of NASA’s manned lunar missions during the Cold War era. It c...

Cold War Nasa Moon Crewed

9.2 Excellent

4

Apollo Lunar Module

The Apollo Lunar Module was a specialized spacecraft developed by NASA to enable crewed landings on the Moon. This two-s...

Cold War Nasa Moon Crewed

9.2 Excellent

5

Opportunity rover

The Opportunity rover was a NASA spacecraft designed to explore the Martian surface. Launched in 2004 as part of the Mar...

Endurance Nasa Mars Rover

9.2 Excellent

6

Curiosity rover

The Curiosity rover is a NASA spacecraft exploring Mars. Launched in November 2011, it landed in Gale Crater in August 2...

Nasa Mars Rover Current

9.2 Excellent

7

Ingenuity helicopter

The Ingenuity helicopter is a rotorcraft developed by NASA for exploration on Mars. It represents a groundbreaking achie...

Helicopter Nasa Mars First Flight

9.2 Excellent

8

Cassini

The Cassini spacecraft was a joint NASA/ESA/ASI mission that orbited Saturn from 2004 to 2017. It provided unprecedented...

Science Flagship Nasa Saturn

9.2 Excellent

9

Perseverance rover

The Perseverance rover is an American spacecraft exploring Mars. It’s currently operating within Jezero Crater, searchin...

Nasa Mars Rover Astrobiology

9.1 Excellent

10

Spirit rover

NASA Mars Exploration Rover that landed in Gusev Crater in January 2004 and operated for over six years before becoming...

2000S Nasa Mars Rover

8.8 Great

11

Sojourner rover

NASA's Sojourner, delivered to Mars by the Pathfinder mission in July 1997, was the first wheeled vehicle to successfull...

1990S Nasa Mars Rover

8.7 Great

12

Mars Odyssey

NASA orbiter launched in 2001 that became the longest-operating spacecraft at Mars, and detected hydrogen deposits sugge...

Nasa Mars Current Orbiter

8.6 Great

13

Mangalyaan (MOM)

Indian Space Research Organisation's Mars Orbiter Mission, launched in 2013, made India the first Asian nation and only...

Indian Mars First Orbiter

8.6 Great

14

Phoenix lander

NASA lander that touched down in Mars's northern polar region in May 2008 and directly confirmed the presence of water i...

Polar Nasa Mars Lander

8.3 Great

15

GRAIL Ebb

One of NASA's twin GRAIL spacecraft launched in 2011 to map the Moon's gravitational field in finer detail than any prev...

Science Nasa Gravity Moon

8.1 Great

16

GRAIL Flow

The second of NASA's twin GRAIL spacecraft that together with Ebb produced the highest-resolution gravitational map of t...

Science Nasa Gravity Moon

8.1 Great

17

Hope (Emirates Mars Mission)

UAE Mars orbiter launched in July 2020, making the United Arab Emirates the first Arab nation to reach Mars orbit when i...

Mars Uae Current Orbiter

7.9 Good

18

Psyche spacecraft

NASA spacecraft launched in October 2023 en route to 16 Psyche, a metal-rich asteroid in the main belt thought to be a r...

Science Nasa Current Orbiter

7.3 Good

19

Beagle 2

British lander launched aboard ESA's Mars Express in 2003 that was lost during its December landing attempt; its wreckag...

UK Mars Lander Esa

4.3 Poor

20

CONTOUR

NASA Comet Nucleus Tour spacecraft launched in 2002 that was lost shortly after its departure burn from Earth orbit due...

Science Nasa Comet Probe

3.1 Poor