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.

📋 What changed recently

Jun 2026Updated Nancy Grace Roman Space Telescope launch estimate to Q2 2027 after schedule review.
Jun 2026Added Euclid DR2 data release reference and updated key discoveries entry.
May 2026Clarified Chandra cooling system status; updated TESS extended mission status to ongoing.

Compare Space Telescopes

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.

Data methodology →

📊 Industry context

Space telescope data has underpinned 1.5 million+ scientific papers since 1990.

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Hubble Space Telescope (HST)+

NASA/ESA

Active

Chandra X-ray Observatory (CXO)+

NASA

Active

Fermi Gamma-ray Space Telescope+

NASA/DOE/international

Active

TESS (Transiting Exoplanet Survey Satellite)+

NASA

Active

James Webb Space Telescope (JWST)+

Nancy Grace Roman Space Telescope (Roman)+

NASA

In Development

Spitzer Space Telescope+

About this tool

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.

📋 What changed recently

Jun 2026Updated Nancy Grace Roman Space Telescope launch estimate to Q2 2027 after schedule review.
Jun 2026Added Euclid DR2 data release reference and updated key discoveries entry.
May 2026Clarified Chandra cooling system status; updated TESS extended mission status to ongoing.