swap_horiz NICER 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 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

10

ICESat-2

ICESat-2 is NASA's 2018 follow-on laser altimetry mission, notable for using ATLAS to measure ice elevation and sea ice...

Laser Active Nasa Ice

8.4 Great

11

Rossi X-ray Timing Explorer

Rossi X-ray Timing Explorer was a NASA satellite launched in 1995 to study fast X-ray variability from black holes, neut...

Astronomy Nasa Past Timing

8.3 Great

12

ACE

ACE is NASA's 1997 Advanced Composition Explorer at Sun-Earth L1, notable for long-running solar wind and energetic part...

Active Nasa Solar Wind Heliophysics

8.3 Great

13

Spektr-RG

Spektr-RG is a Russian-German X-ray observatory launched in 2019 to L2, notable for eROSITA and ART-XC all-sky surveys o...

Astronomy Russia Telescope Active

8.2 Great

14

Landsat 9

Landsat 9 is the 2021 NASA-USGS land imaging satellite, notable for continuing the 50-year Landsat record with OLI-2 and...

Imaging Active Nasa Earth

8.2 Great

15

GRACE-FO

GRACE-FO is the 2018 NASA-GFZ follow-on twin mission, notable for continuing gravity mapping and testing laser inter-sat...

Active Nasa Gravity Earth

8.2 Great

16

MAVEN

MAVEN is a NASA Mars orbiter launched in 2013 to study the upper atmosphere and how solar wind stripped gases from the p...

Active Nasa Mars Atmosphere

8.2 Great

17

2001 Mars Odyssey

2001 Mars Odyssey is a NASA orbiter launched in 2001 that mapped Martian hydrogen, found evidence for water ice, and rel...

Mapping Active Nasa Mars

8.1 Great

18

MMS

MMS is NASA's 2015 Magnetospheric Multiscale mission, a four-spacecraft formation built to measure magnetic reconnection...

Active Nasa Plasma Magnetosphere

7.9 Good

19

SWOT

SWOT is a NASA-CNES Earth-observing satellite launched in 2022 to make the first global survey of surface water and ocea...

Water Active Nasa Earth

7.9 Good

20

XPoSat

XPoSat is ISRO's 2024 X-ray Polarimeter Satellite, India's first mission dedicated to measuring polarization from bright...

Astronomy Active X Ray Polarimetry

6.7 Fair