Person

Edwin Hubble

الفلكي الأمريكي الذي اكتشف عام 1929 أن مسافات المجرات البعيدة تتناسب طرديًا مع انزياحها الأحمر.

Edwin Powell HubbleHubble

Hubble Space Telescope

The Hubble Space Telescope is a NASA/ESA observatory launched on 24 April 1990 aboard the space shuttle Discovery. Orbiting about 483 km above Earth, its 2.4-meter mirror has made more than 1.7 million observations, from the deep fields that revealed thousands of galaxies to measurements that fixed the universe's expansion rate at near one percent precision. Astronauts serviced the telescope five times between 1993 and 2009 — the first mission correcting the spherical aberration that blurred its early images — and since June 2024 Hubble has operated in one-gyro mode, continuing its work alongside the James Webb Space Telescope.

25/25 claims verified 15 min read· 2026-09-17

The Big Bang

The Big Bang is the prevailing model of how the universe began: about 13.8 billion years ago the cosmos expanded from an extremely hot and dense state and has been cooling and expanding ever since. Three independent lines of evidence converge on it — the expansion of the universe described by Hubble's law, the cosmic microwave background at 2.725 K released about 380,000 years after the beginning, and the predicted abundances of hydrogen, helium and lithium forged in the first minutes. This article follows that evidence chain from Hubble's 1929 observations to the Planck and DESI results, and explains what the theory does — and does not — claim.

25/25 claims verified 14 min read· 2026-09-18

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Hubble constant · discovered Big Bang · evidence_for Hubble Space Telescope · named_after Hubble Space Telescope · named_after Big Bang · supported