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

8.83 Great

2

Hipparcos

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

Parallax Decommissioned Space Based Astrometry

8.65 Great

3

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

8.62 Great

4

Planck

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

Decommissioned Microwave Space Based Cmb

8.60 Great

5

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

8.56 Great

6

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

8.55 Great

7

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

8.49 Great

8

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

8.46 Great

9

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

8.46 Great

10

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

8.37 Great

11

Euclid Space Telescope

The Euclid Space Telescope is a wide-angle space telescope developed by the European Space Agency (ESA) and launched by...

Cosmology Space Optical Infrared

8.37 Great

12

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

8.33 Great

13

LAMOST

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

Survey China Optical Spectroscopy

8.19 Great

14

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

8.19 Great

15

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

8.19 Great

16

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

8.19 Great

17

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

8.14 Great

18

Lincoln Near-Earth Asteroid Research

The Lincoln Near-Earth Asteroid Research (LINEAR) project is an astronomical survey operated jointly by the MIT Lincoln...

Survey Optical New Mexico Ground Based

8.14 Great

19

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

8.10 Great

20

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

8.10 Great