Search Results for: [email protected]/page/22/[email protected]/page/19/[email protected]

…the observable universe. In light, the farthest we can see comes from the cosmic microwave background, a time 13.8 billion years ago when the universe was opaque like thick fog….

Copyright: Dheera Venkatraman Stars come in bunches. The most famous bunch of stars on the sky is the Pleiades, a bright cluster that can be easily seen with the unaided…

…image of a distant galaxy into a complete circle. To create a complete Einstein ring there must be perfect alignment of the nearby galaxy’s center and part of the background…

Copyright: Jiang Wu Scanning the skies for galaxies, Canadian astronomer Paul Hickson and colleagues identified some 100 compact groups of galaxies, now appropriately called Hickson Compact Groups. The four prominent…

…In this two-star system, gravity causes the larger and fluffier star to give up mass to a smaller and denser white dwarf companion. Eventually the white dwarf’s near-surface temperature goes…

…because it also appears that you are looking down the axis of a helix. In actuality, it is now understood to have a surprisingly complex geometry, including radial filaments and…

…entry into Earth’s atmosphere. These grains were shed from Comet Swift-Tuttle. The Perseids result from the annual crossing of the Earth through Comet Swift-Tuttle’s orbit, and are typically the most…

Copyright: How big is planet Earth’s Moon How big is planet Earth’s Moon? Compared to other moons of the Solar System, it’s number 5 on the largest to smallest ranked…

…now above the horizon in November morning skies and will make its closest approach to Earth, a comfortable 270 million kilometers distant, around December 19. Courtesy of NASA Astronomy Picture…

…the night of December 15. Though faint, colors emphasized in the image data, show off the comet’s yellowish dust tail and bluish ion tail along with a greenish tinged coma….