swap_horiz Gaia Alternatives

1

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

2

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

3

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

4

SOHO

SOHO is a space-based observatory operated jointly by NASA and the European Space Agency. It monitors the Sun’s activity...

Solar Nasa Space Based Esa

9.3 Excellent

5

Vera C. Rubin Observatory

The Vera C. Rubin Observatory is a ground-based facility in Chile designed to conduct a ten-year comprehensive sky surve...

Survey Optical Chile Ground Based

9.2 Excellent

6

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

7

Fermi Gamma-ray Space Telescope

The Fermi Gamma-ray Space Telescope is a NASA observatory orbiting Earth. It detects high-energy gamma rays, providing i...

Survey High Energy Nasa Space Based

9.1 Excellent

8

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

9

LAMOST

The LAMOST observatory is a ground-based optical telescope located in Xinglongshan, China. It conducts a wide-field surv...

Survey China Optical Spectroscopy

8.9 Great

10

Anglo-Australian Telescope

The Anglo-Australian Telescope is a 3.9-meter ground-based optical telescope located in Siding Spring Observatory, New S...

Survey Australia Optical Spectroscopy

8.9 Great

11

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

12

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

13

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

14

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

15

Roman Space Telescope

The Roman Space Telescope is a NASA observatory designed for wide-field surveys of the universe. Utilizing both optical...

Survey Optical Nasa Infrared

8.8 Great

16

Pan-STARRS

The Panoramic Survey Telescope and Rapid Response System (Pan-STARRS) is a wide-field astronomical imaging facility loca...

Survey Hawaii Optical Ground Based

8.6 Great

17

Zwicky Transient Facility

The Zwicky Transient Facility (ZTF) is a wide-field astronomical survey instrument operating at Palomar Observatory in s...

Survey California Optical Ground Based

8.6 Great

18

Catalina Sky Survey

The Catalina Sky Survey (CSS) is a NASA-funded astronomical project based at the University of Arizona in Tucson. Utiliz...

Survey Arizona Optical Near Earth Objects

8.5 Great

19

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

20

LISA Pathfinder

LISA Pathfinder was an European Space Agency technology demonstrator spacecraft launched on December 3, 2015. Its primar...

Decommissioned Space Based Gravitational Wave Esa

8.4 Great