Tähdet ja avaruus: Halleyn komeetta ohitti ratansa kaukaisimman pisteen
Vuonna 1986 Auringon viimeksi ohittanut Halleyn komeetta palaa aurinkokunnan sisäosiin 2061. Juuri nyt on näiden ajankohtien puoliväli. Komeetta ohitti ratansa kaukaisimman pisteen 8. joulukuuta.
Neptune's Disappearing Clouds Linked to the Solar Cycle
The link between Neptune and solar activity is surprising to planetary scientists because Neptune is our solar system's farthest major planet and receives sunlight with about 0.1% of the intensity Earth receives.
New study puts a definitive age on Saturn’s rings: They’re really young
The research, published May 12 in the journal Science Advances, pegs the age of Saturn's rings at no more than 400 million years old. That makes the rings much younger than Saturn itself, which is about 4.5 billion years old.
New Study of Uranus’ Large Moons Shows 4 May Hold Water
Re-analysis of data from NASA’s Voyager spacecraft, along with new computer modeling, has led NASA scientists to conclude that four of Uranus’ largest moons likely contain an ocean layer between their cores and icy crusts.
This new NASA animation highlights the “super” in supermassive black holes. These monsters lurk in the centers of most big galaxies, including our own Milky Way, and contain between 100,000 and tens of billions of times more mass than our Sun.
Tähdet ja avaruus: Marsin pinnasta julkaistiin selailtava kartta 6 metrin erotustarkkuudella
Naapuriplaneetan yksityiskohtia voi nyt tarkastella kattavammin kuin koskaan ennen. Nasa on julkaissut selailtavan kuvamosaiikin käytännössä koko Marsin pinnasta.
