Nombre total de pages vues

Affichage des articles dont le libellé est ASTRONOMY - Quadrantids of the North. Afficher tous les articles
Affichage des articles dont le libellé est ASTRONOMY - Quadrantids of the North. Afficher tous les articles

11/01/2024

ASTRONOMY - Quadrantids of the North

 2024 January 11

See Explanation.  Clicking on the picture will download
the highest resolution version available.

Quadrantids of the North
Image Credit & Copyright염범석 Yeom Beom-seok

Explanation: Named for a forgotten constellation, the Quadrantid Meteor Shower puts on an annual show for planet Earth's northern hemisphere skygazers. The shower's radiant on the sky lies within the old, astronomically obsolete constellation Quadrans Muralis. That location is not far from the Big Dipper asterism, known to some as the Plough, at the boundaries of the modern constellations Bootes and Draco. In fact the Big Dipper "handle" stars are near the upper right corner in this frame, with the meteor shower radiant just below. North star Polaris is toward the top left. Pointing back toward the radiant, Quadrantid meteors streak through the night in this skyscape from Jangsu, South Korea. The composite image was recorded in the hours around the shower's peak on January 4, 2024. A likely source of the dust stream that produces Quadrantid meteors was identified in 2003 as an asteroid.

08/01/2022

ASTRONOMY - Quadrantids of the North

 2022 January 8

See Explanation.  Clicking on the picture will download
the highest resolution version available.

Quadrantids of the North
Image Credit & Copyright: Cheng Luo

Explanation: Named for a forgotten constellation, the Quadrantid Meteor Shower puts on an annual show for planet Earth's northern hemisphere skygazers. The shower's radiant on the sky lies within the old, astronomically obsolete constellation Quadrans Muralis. That location is not far from the Big Dipper, at the boundaries of the modern constellations Bootes and Draco. In fact north star Polaris is just below center in this frame and the Big Dipper asterism (known to some as the Plough) is above it, with the meteor shower radiant to the right. Pointing back toward the radiant, Quadrantid meteors streak through the night in the panoramic skyscape, a composite of images taken in the hours around the shower's peak on January 4, 2022. Arrayed in the foreground are radio telescopes of the Chinese Spectral Radioheliograph, Mingantu Observing Station, Inner Mongolia, China. A likely source of the dust stream that produces Quadrantid meteors was identified in 2003 as an asteroid.

METEOROLOGIE - Ciel de feu à Barcelone

Ce ciel de feu spectaculaire a été pris en photo à Barcelone en Espagne : on peut y voir des nuages lenticulaires très bien formés, par l&...