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

The Spirit rover was a robotic Mars exploration vehicle that successfully landed in Gusev Crater in January 2004 as part...

2000S Nasa Mars Rover

8.8 Great

11

Sojourner rover

The Sojourner rover was a 11.5-kilogram, six-wheeled robotic vehicle delivered to Mars as part of NASA's Mars Pathfinder...

1990S Nasa Mars Rover

8.7 Great

12

Mars Odyssey

2001 Mars Odyssey is a robotic spacecraft orbiting Mars, launched by NASA in April 2001. It holds the record for the lon...

Nasa Mars Current Orbiter

8.6 Great

13

Mangalyaan (MOM)

Mangalyaan, formally the Mars Orbiter Mission (MOM), is a space probe launched by the Indian Space Research Organisation...

Indian Mars First Orbiter

8.6 Great

14

Phoenix lander

Phoenix was a NASA Mars lander, part of the agency's Scout program, that touched down on May 25, 2008, in the Martian ar...

Polar Nasa Mars Lander

8.3 Great

15

GRAIL Ebb

GRAIL Ebb is one of NASA's twin Gravity Recovery and Interior Laboratory spacecraft, launched in 2011 to conduct a compr...

Science Nasa Gravity Moon

8.1 Great

16

GRAIL Flow

GRAIL Flow is the second of NASA's twin Gravity Recovery and Interior Laboratory spacecraft, launched alongside its coun...

Science Nasa Gravity Moon

8.1 Great

17

Hope (Emirates Mars Mission)

Hope, formally the Emirates Mars Mission, is a United Arab Emirates spacecraft launched in July 2020 to study the Martia...

Mars Uae Current Orbiter

7.9 Good

18

Psyche spacecraft

The Psyche spacecraft is a NASA orbiter launched in October 2023 aboard a SpaceX Falcon Heavy rocket, intended to study...

Science Nasa Current Orbiter

7.3 Good

19

Beagle 2

Beagle 2 was a British Mars lander carried by the European Space Agency's Mars Express mission, launched in 2003. It was...

UK Mars Lander Esa

4.3 Poor

20

CONTOUR

CONTOUR (Comet Nucleus Tour) was a NASA Discovery-program spacecraft launched on a Delta II rocket in July 2002 to make...

Science Nasa Comet Probe

3.1 Poor