Pick up to 4 telescopes to compare side-by-side. State lives in the URL — share the link and the comparison loads exactly as you left it.
Space telescope data has underpinned 1.5 million+ scientific papers since 1990.
| Attribute | TESS (Transiting Exoplanet Survey Satellite) NASA · 🇺🇸 Active · Last updated 2026-06-01Trust: Agency-primaryⓘ Last verified Remove × | Hubble Space Telescope (HST) NASA/ESA · 🇺🇸 Active · Last updated 2026-06-01Trust: Agency-primaryⓘ Last verified Remove × | |
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| Agency | NASA | ESA | NASA/ESA |
| Status | Active | Active | Active |
| Wavelength band | optical | multi | multi |
| Launch year | 2018 | 2023 | 1990 |
| Orbit | High Earth orbit (P/2 lunar resonance orbit) | Sun-Earth L2 point | Low Earth Orbit (LEO) ~547 km |
| Mirror / aperture | — | 1.2 mas of [1] | 2.4 mas of [1] ↑ Largest |
| Mass | 362 kgas of [1] | 2,160 kgas of [1] | 11,110 kgas of [1] ↑ Heaviest |
| Wavelength range | 0.6–1.0 μm (red optical) | 0.55–2.02 μm (optical VIS + near-IR NISP) | 0.115–2.5 μm (UV, optical, near-IR) |
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| Summary | NASA's all-sky transit photometry survey, successor to Kepler. TESS monitors nearly the entire sky in 27-day sectors using four wide-field cameras, targeting the 200,000 brightest stars nearest to Earth. Its targets are close enough for atmospheric follow-up by ground telescopes and JWST. | ESA's dark energy explorer, launched July 1, 2023. Euclid will map the 3D distribution of ~1.5 billion galaxies across a third of the sky over 6 years, measuring dark energy and dark matter with unprecedented precision. Its first science-quality images, released February 2024, demonstrated exceptional optics. | The most scientifically productive telescope ever built. Launched in 1990 and serviced five times by Space Shuttle crews, Hubble has logged over 1.6 million observations and contributed to more than 21,000 peer-reviewed publications. Its image of the Hubble Deep Field fundamentally changed our understanding of galaxy formation. |
All 9 major space telescopes with primary-source citations from NASA, ESA, STScI, and JPL. Pure URL state — bookmark or share the link and the comparison reproduces exactly.