Télescopes : observer l'univers en détail

A Mysterious Radio Signal from Space Is Ticking Every 16 Days — And Astronomers Are Listening Closely

Astronomers have detected a mysterious radio signal from space that repeats on a 16.35‑day clock. The pattern — brief fast radio bursts arriving in a four‑day active window every … Mar 22, 2026

History

Uranus: Discovery of the Seventh Planet

On March 13, 1781, William Herschel announced a new world — the first planet found with a telescope. The discovery expanded the known solar system and set off debates over naming,… Mar 13, 2026

Space

7 Easy Tips to Photograph Tonight’s Blood Moon

Practical, camera-agnostic advice for capturing the March 3, 2026 total lunar eclipse — gear, settings, composition and smartphone tricks to help you shoot the red Moon. Mar 04, 2026

Science

Hipparchus’s Lost Star Map Recovered

Researchers at SLAC/Stanford used powerful X-ray beams to read hidden Greek astronomical notes beneath a medieval palimpsest, recovering star coordinates from Hipparchus—the oldes… Jan 24, 2026

Space Weather

Artificial Eclipses to Study Solar Storms

Scientists are pushing two complementary approaches — a formation-flying coronagraph and a proposed Moon‑occultation mission called Mesom — to create artificial solar eclipses tha… Jan 24, 2026

Science

Webb’s Sharpest View of Black Hole Edge

James Webb’s aperture-masking interferometry has produced the sharpest infrared image yet of the Circinus galaxy’s central black hole, showing most emission comes from a compact d… Jan 19, 2026

Space

EHT Aims First Movie of M87

The Event Horizon Telescope is mounting a focused observing campaign in March–April 2026 to assemble the first time-resolved sequence of the supermassive black hole in Messier 87,… Jan 18, 2026

Space

Three Supermassive Black Holes Merging

Astronomers have identified a rare triple supermassive black hole system in the nearby galaxy NGC 6240, revealing three nuclei packed inside a kiloparsec and offering a new route … Déc 31, 2025

Space

Comet Tracker: Where to See the Comets on Thursday, Oct. 23, 2025

Comets Lemmon (C/2025 A6) and SWAN (C/2025 R2) are visible after sunset in the Northern Hemisphere on Oct. 23, 2025. Binoculars will help reveal their tails; this is a last good v… Nov 12, 2025

Télescopes

Articles about Télescopes

A Mysterious Radio Signal from Space Is Ticking Every 16 Days — And Astronomers Are Listening Closely

Uranus: Discovery of the Seventh Planet

7 Easy Tips to Photograph Tonight’s Blood Moon

Hipparchus’s Lost Star Map Recovered

Artificial Eclipses to Study Solar Storms

Webb’s Sharpest View of Black Hole Edge

EHT Aims First Movie of M87

Three Supermassive Black Holes Merging

Comet Tracker: Where to See the Comets on Thursday, Oct. 23, 2025