swap_horiz ROSAT Alternatives

1

Cassini-Huygens

The Cassini-Huygens mission, operated by NASA and ESA, was a space-based observatory dedicated to studying Saturn and it...

Decommissioned Nasa Planetary Space Based

9.8 Brilliant

2

Kepler Space Telescope

The Kepler Space Telescope was a NASA observatory launched in 2009. It monitored over 150,000 stars for dips in brightne...

Decommissioned Optical Nasa Space Based

9.6 Brilliant

3

Planck

The Planck mission was a European Space Agency-operated observatory designed to study the Cosmic Microwave Background (C...

Decommissioned Microwave Space Based Cmb

9.4 Excellent

4

Hipparcos

Hipparcos was a European Space Agency observatory launched in 1989. It performed groundbreaking measurements of stellar...

Parallax Decommissioned Space Based Astrometry

9.4 Excellent

5

Spitzer Space Telescope

The Spitzer Space Telescope was a NASA space-based observatory operating from 2003 to 2020. It utilized infrared light t...

Survey Decommissioned Nasa Infrared

9.2 Excellent

6

Herschel Space Observatory

The Herschel Space Observatory is a decommissioned space-based observatory operated by the European Space Agency (ESA)....

Decommissioned Infrared Space Based Esa

9.1 Excellent

7

Neil Gehrels Swift Observatory

The Neil Gehrels Swift Observatory is a NASA spacecraft dedicated to studying high-energy astrophysical events. Launched...

Nasa Space Based Gamma Ray X Ray

9.0 Excellent

8

XMM-Newton

The XMM-Newton observatory, operated by ESA, observes the universe primarily in X-rays. Its large telescope allows for d...

High Energy Space Based X Ray Photometry

8.9 Great

9

Compton Gamma Ray Observatory

The Compton Gamma Ray Observatory was a NASA space-based observatory that operated from 1991 until its decommissioning i...

Decommissioned High Energy Nasa Space Based

8.9 Great

10

BeppoSAX

BeppoSAX was a European Space Agency observatory launched in 1996. This satellite primarily observed X-rays and gamma ra...

Historical Space Based X Ray Gamma Ray Bursts

8.9 Great

11

eROSITA

eROSITA is a German observatory utilizing a space-based x-ray telescope. Launched in 2019 as part of the Spektr-RG missi...

Germany Survey All Sky Space Based

8.9 Great

12

WISE

WISE was a NASA space observatory designed to conduct a comprehensive all-sky infrared survey. Launched in 2009, it scan...

Survey All Sky Nasa Infrared

8.8 Great

13

Uhuru

Uhuru was a NASA-operated space observatory launched in 1970 as the first satellite dedicated specifically to X-ray astr...

Historical Nasa Space Based X Ray

8.6 Great

14

Einstein Observatory

The Einstein Observatory, originally designated HEAO-2, was a pioneering NASA X-ray telescope launched into Earth orbit...

Historical Nasa Space Based X Ray

8.5 Great

15

XRISM

XRISM (X-Ray Imaging and Spectroscopy Mission) is a space observatory jointly developed by JAXA and NASA, launched in Se...

Nasa Space Based Spectroscopy X Ray

8.5 Great

16

Hinode

Hinode, which translates to "sunrise" in Japanese, is a solar observation satellite developed by the Japan Aerospace Exp...

Solar Space Based X Ray Esa

8.4 Great

17

RXTE

The Rossi X-ray Timing Explorer (RXTE) was a NASA satellite launched on December 30, 1995, to study time variability in...

Decommissioned Nasa Space Based Timing

8.4 Great

18

Suzaku

Suzaku was a Japanese space telescope developed for X-ray astronomy by the Japan Aerospace Exploration Agency in collabo...

Decommissioned Space Based Spectroscopy X Ray

8.1 Great

19

EXOSAT

EXOSAT was a European Space Agency space observatory launched in 1983 to study X-ray sources beyond Earth. Operating unt...

Decommissioned Historical Space Based X Ray

7.6 Good

20

Astro-H / Hitomi

ASTRO-H, later named Hitomi, was a Japanese X-ray astronomy satellite developed by JAXA with international partners, inc...

High Resolution Decommissioned Space Based X Ray

4.5 Poor