Size Duel deck / Ships, aircraft and spacecraft
Herschel Space Observatory
Mass: launch mass, with its helium coolant
about 3.4 t (7,496 lb)
A European telescope that saw the sky in far-infrared light.
Sources and checks
Checked 2026-10-21: Researched by Codex (two independent publishers, verbatim quotes); every counted quote re-found on its page by the server check (content-verify); scope and plausibility reviewed by Claude (AI build agent). Quotes are short passages from each source.
“3400 kg”European Space Agency: source, retrieved 2026-10-21; quote re-found by the server check
“3,400 kilograms”NASA: source, retrieved 2026-10-21; quote re-found by the server check
“3400 kg”European Space Agency: source, retrieved 2026-10-21; quote re-found by the server check
“3400 kg”Gunter Dirk Krebs / Gunter’s Space Page: source, retrieved 2026-10-21; quote re-found by the server check
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