Quoi de neuf en juin ? Une rupture planétaire, une observation de premier ordre d’un amas d’étoiles bien connu et la constellation de la Lyre.
Les points forts de l’observation du ciel en juin 2022 comprennent le rassemblement de quatre planètes à l’œil nu (Saturn, Mars, Jupiter, and Venus) in the morning sky. Check these out, before they break up. There is also the Hercules Cluster, one of the most well-known globular clusters, which you’ll be able to see with just binoculars if you don’t have access to a telescope. Enjoy a nice view of the constellation Lyra, which is easy to locate by looking for Vega, one of the brightest stars in the sky.
Le rassemblement de quatre planètes à l’œil nu dont nous avons profité dans le ciel du matin au cours des derniers mois – y compris plusieurs conjonctions rapprochées, commence à se disloquer. Au cours des prochains mois, Saturne, Mars, Jupiter et Vénus apparaîtront de plus en plus dispersés dans le ciel matinal, à tel point que Vénus et Saturne cesseront d’être des objets matinaux pour la plupart des observateurs en septembre.
Observez cette précession planétaire de plus en plus espacée en juin, et notez que le croissant de lune fait son apparition dans l’alignement le matin du 23.
Juin est une excellente période pour observer l’un des amas d’étoiles globulaires les plus connus – M13, également connu sous le nom d’amas d’Hercule. Les amas globulaires sont des collections sphériques d’étoiles, serrées les unes contre les autres en leur centre. M13 lui-même contient plusieurs centaines de milliers d’étoiles.
Les amas globulaires sont également extrêmement anciens. On pense que les étoiles de M13 ont environ 12 milliards d’années, ce qui se rapproche de l’âge de l’univers lui-même. Notre galaxie d’origine, la Milky Way, is known to have about 150 globular clusters. They orbit outside the galaxy’s disk, traveling tens of thousands of light-years above and below its spiral arms and most of its stars.
Now, the Hercules Cluster is best observed with a telescope, and larger telescopes will allow you to see more of the cluster’s stars. But you can also find it with a pair of binoculars, where it’ll look like a hazy little spot.
Find M13 in the constellation Hercules, which is high in the east in the first couple of hours after dark in June.
First look for the bright stars Vega and Arcturus.
Then find the four stars that comprise “the Keystone,” which is the pattern making up the central part of Hercules.
You’ll find M13 about a third of the way between the two stars on the western, or leading, side of the Keystone.
So check out the Great Globular Cluster in Hercules, M13, in June, and find yourself staring at an ancient gathering of stars that soars high above the Milky Way.
Finally in June, a quick introduction to one of the smaller constellations that’s home to one of the brightest stars.
That’s the constellation Lyra.
It represents a lyre, or harp, played by the musician Orpheus in Greek mythology.
In Arab cultures, as well as ancient Egypt and India, Lyra was seen as an eagle.
And the Inca of South America saw it as a llama.
Find Lyra by looking for Vega, which is the westernmost of the three bright stars in the Summer Triangle.
In the Northern Hemisphere, you’ll find it halfway up the eastern sky in the first couple of hours after dark in June.
Vega is by far the brightest star in Lyra.
It’s the fifth brightest star in the sky and the second brightest in the Northern Hemisphere, after Sirius.
A pair of binoculars will help you see the others stars in Lyra, which form a sort of parallelogram hanging beneath it.
It’s sometimes described as looking a bit like a diamond ring, with Vega as the diamond.
And that’s not the only ring in Lyra. It’s also home to the famous Ring Nebula, where a star has blown off most of its outer layers, leaving behind a remnant star known as a white dwarf.
So let the bright star Vega lead you to Lyra, the harp constellation, in the June sky. And if you see it as an eagle, or a diamond ring, or a llama, well that’s perfectly okay too…