lördag 10 januari 2026

Good seeing watching the moon

Very good view through the telescope when I looked at the moon the other week. At the top is Montes Jura, it surrounds the smooth lava bed Sinus Iridum (Bay of Rainbows) on the northwestern edge of Mare Imbrium (Sea of ​​Rain). A little to the south is the mountain range Montes Recti where the highest peaks reach a height of about 1.8 km (Latin for "Straight Mountains") is a distinctive, linear mountain range on the moon, located in the northern part of Mare Imbrium. Below are the mountains Montes Teneriffa (Tenerife Mountains) with individual peaks at heights of up to 2.4 kilometers. The crater Plato (in Swedish often called Platon) is one of the moon's most famous and easily recognizable impact craters. It is particularly famous for its dark, flat bottom and its location at the edge of one of the large lunar oceans. Plato has one of the darkest surfaces on the moon because it is filled with old, solidified basaltic lava. Astronomers like Johannes Hevelius once called it "The Great Black Lake"



 

måndag 5 januari 2026

Moonlit snow crystals


97% moon and the bright planet Jupiter next to it. In the cold snowy landscape, small crystals of different colors are seen in the snow taken with a macro lens. Even the two-bright stars Castor and Pollux are seen above the moon.
Snow crystals appear in different colors primarily due to light interference (thin films, prisms) or contamination, with thin-film interference causing iridescent blues, purples, and rainbow hues from light reflecting off layers, while contamination from algae (watermelon snow, green) or dirt/pollen creates vibrant reds, greens, and even blacks, altering the crystal's pure white appearance

 

måndag 29 december 2025

74% moon

 

Opened up the observatory and started to adjust the focus, connect the camera etc. and had just started taking pictures when heavy snowstorms came. But between these I was able to take pictures of tonight's moon which was 74% full. In the pictures you can see large craters like Copernicus, Plato, Archimedes and lava fields like Mare Imbrium with high mountain ranges Montes Alpes. Montes Alpes (Lunar Alps) is a prominent mountain range on the northern side of the moon, named after the Alps on Earth, and known for its highest mountain, Mons Blanc (3,600 m), and the impressive valley Vallis Alpes. The chain extends for about 220 km in a crescent shape, with a part bordering the lunar sea Mare Imbrium, and is one of the moon's most distinctive formations. Vallis Alpes is a lunar valley that divides the Montes Alpes area into two parts. It extends 166 km from the Mare Imbrium basin and trends east-northeast to the edge of Mare Frigoris. The valley is narrow at both ends and widens to a maximum width of about 10 km along the midsection. Copernicus is a prominent impact crater on the Moon located in the eastern Oceanus Procellarum. The crater is 96 km in diameter and 3.8 km deep. According to samples taken by Apollo 12 astronauts, the crater is about 800 million years old.