swap_horiz EXOSAT Alternatives
Looking for alternatives to EXOSAT? Compare the top Observatory options ranked by our AI scoring system.
EXOSAT
EXOSAT was a European Space Agency space observatory launched in 1983 to study X-ray sources beyond Earth. Operating until 1986, it observed objects within and outside the Milky Way, including compact stars, binary systems, active galactic nuclei, and other variable high-energy sources. Its highly e...
apps Top EXOSAT Alternatives
The top alternative to EXOSAT in 2026 is Planck Observatory with a score of 9.17/10, followed by Cassini-Huygens (9.02) and Gaia (8.92).
Planck Observatory
The Planck Observatory was a European Space Agency satellite launched in 2009. It meticulously measured microwave radiat...
Cassini-Huygens
The Cassini-Huygens mission, operated by NASA and ESA, was a space-based observatory dedicated to studying Saturn and it...
Gaia
The Gaia observatory is a space-based mission operated by the European Space Agency. It meticulously surveys our galaxy,...
Kepler Space Telescope
The Kepler Space Telescope was a NASA observatory launched in 2009. It monitored over 150,000 stars for dips in brightne...
Hipparcos
Hipparcos was a European Space Agency observatory launched in 1989. It performed groundbreaking measurements of stellar...
Planck
The Planck mission was a European Space Agency-operated observatory designed to study the Cosmic Microwave Background (C...
Herschel Space Observatory
The Herschel Space Observatory is a decommissioned space-based observatory operated by the European Space Agency (ESA)....
XMM-Newton
The XMM-Newton observatory, operated by ESA, observes the universe primarily in X-rays. Its large telescope allows for d...
BeppoSAX
BeppoSAX was a European Space Agency observatory launched in 1996. This satellite primarily observed X-rays and gamma ra...
ROSAT
ROSAT, short for Röntgensatellit, was a German-led space observatory launched in 1990 for X-ray and extreme-ultraviolet...
Uhuru
Uhuru was a NASA-operated space observatory launched in 1970 as the first satellite dedicated specifically to X-ray astr...
Einstein Observatory
The Einstein Observatory, originally designated HEAO-2, was a pioneering NASA X-ray telescope launched into Earth orbit...
Hinode
Hinode, which translates to "sunrise" in Japanese, is a solar observation satellite developed by the Japan Aerospace Exp...
RXTE
The Rossi X-ray Timing Explorer (RXTE) was a NASA satellite launched on December 30, 1995, to study time variability in...
LISA Pathfinder
LISA Pathfinder was an European Space Agency technology demonstrator spacecraft launched on December 3, 2015. Its primar...
ASCA
The Advanced Satellite for Cosmology and Astrophysics (ASCA), known as ASTRO-D before launch, was a Japanese X-ray astro...
IXPE
The Imaging X-ray Polarimetry Explorer (IXPE) is a NASA space observatory launched on December 9, 2021, designed to meas...
Suzaku
Suzaku was a Japanese space telescope developed for X-ray astronomy by the Japan Aerospace Exploration Agency in collabo...
INTEGRAL
INTEGRAL (International Gamma-Ray Astrophysics Laboratory) is a space telescope launched by the European Space Agency on...
Astro-H / Hitomi
ASTRO-H, later named Hitomi, was a Japanese X-ray astronomy satellite developed by JAXA with international partners, inc...
summarize Quick Comparison Summary
See all Observatory ranked by score
emoji_events View Full Observatory Rankings
