September 2014
S M T W T F S
« Aug    
 123456
78910111213
14151617181920
21222324252627
282930  
News for Norther Colorado and the world

Thursday, September 18, 2014

Posts Tagged ‘astronomy’

Astronomy Picture of the Day

Astronomy Picture of the Day

MESSENGER at Mercury Credit: NASA/JHU APL/CIW Explanation: On March 17, the MESSENGER spacecraft became the first to orbit Mercury, the solar system's innermost planet. This is its first processed color image since entering Mercury orbit. Larger, denser, and with almost twice the surface gravity of Earth's moon, Mercury still looks moon-like at first glance. But in this view its terrain shows light blue and brown areas near craters and long bright rays of material streaking the ... Full Story

Astronomy Picture of the Day

Astronomy Picture of the Day

NGC 5584: Expanding the Universe Credit: NASA, ESA, A. Riess (STScI/JHU), L. Macri (Texas A & M Univ.) et al., Hubble Heritage (STScI/AURA) Explanation: Big, beautiful NGC 5548 is more that 50,000 light-years across and lies 72 million light-years away toward the constellation Virgo. The winding spiral arms of this gorgeous island universe are loaded with luminous young star clusters and dark dust lanes. Still, for earthbound astronomers NGC 5548 is not just another pretty ... Full Story

Astronomy Picture of the Day

Astronomy Picture of the Day

  T Tauri and Hind's Variable Nebula Image Credit & Copyright: Adam Block, Mt. Lemmon SkyCenter, U. Arizona Explanation: The yellowish star near center in this remarkable telescopic skyview is T Tauri, prototype of the class of T Tauri variable stars. Nearby it is a dusty yellow cosmic cloud historically known as Hind's Variable Nebula (NGC 1555). Over 400 light-years away, at the edge of a molecular cloud, both star and nebula are seen to vary significantly in brightness ... Full Story

Astronomy Picture of the Day

Astronomy Picture of the Day

    Io in True Color Credit: Galileo Project, JPL, NASA Explanation: The strangest moon in the Solar System is bright yellow. This picture, an attempt to show how Io would appear in the "true colors" perceptible to the average human eye, was taken in 1999 July by the Galileo spacecraft that orbited Jupiter from 1995 to 2003. Io's colors derive from sulfur and molten silicate rock. The unusual surface of Io is kept very young by its system of active volcanoes. The ... Full Story

Astronomy Picture of the Day

Astronomy Picture of the Day

  Martian Moon Phobos from Mars Express Credit: G. Neukum (FU Berlin) et al., Mars Express, DLR, ESA; Acknowledgement: Peter Masek Explanation: Why is Phobos so dark? Phobos, the largest and innermost of two Martian moons, is the darkest moon in the entire Solar System. Its unusual orbit and color indicate that it may be a captured asteroid composed of a mixture of ice and dark rock. The above picture of Phobos near the limb of Mars was captured in November, 2010 by the ... Full Story

Astronomy Picture of the Day

Astronomy Picture of the Day

Boston Moonrise Image Credit & Copyright: Dennis Di Cicco (TWAN) Explanation: Last week's Full Moon was hard to miss. Rising on March 19, its exact full phase occurred within an hour of perigee, the closest point in the Moon's orbit to Earth. As a result it appeared some 14 percent larger and 30 percent brighter than a Full Moon near apogee, the most distant point in the elliptical lunar orbit. Seen here, the near perigee Full Moon still hugs the horizon, distorted by ... Full Story

Astronomy Picture of the Day

Astronomy Picture of the Day

  MWC 922: The Red Square Nebula Credit & Copyright: Peter Tuthill (Sydney U.) & James Lloyd (Cornell) Explanation: What could cause a nebula to appear square? No one is quite sure. The hot star system known as MWC 922, however, appears to be embedded in a nebula with just such a shape. The above image combines infraredexposures from the Hale Telescope on Mt. Palomar in California, and the Keck-2 Telescope on Mauna Kea in Hawaii. A leading progenitor hypothesis for ... Full Story

Astronomy Picture of the Day

Astronomy Picture of the Day

    Messier 106 Image Credit & Copyright: R Jay Gabany Explanation: Close to the Great Bear (Ursa Major) and surrounded by the stars of the Hunting Dogs (Canes Venatici), this celestial wonder was discovered in 1781 by the metric French astronomer Pierre Mechain. Later, it was added to the catalog of his friend and colleague Charles Messier as M106. Modern deep telescopic views reveal it to be an island universe -- a spiral galaxy around 30 thousand light-years ... Full Story

Astronomy Picture of the Day

Astronomy Picture of the Day

  NGC 3621: Far Beyond the Local Group   Credit & Copyright: Robert Gendler Explanation: Far beyond the local group of galaxies lies NGC 3621, some 22 million light-years away. Found in the multi-headed southern constellation Hydra, the winding spiral arms of this gorgeous island universe are loaded with luminous young star clusters and dark dust lanes. Still, for earthbound astronomers NGC 3621 is not just another pretty face-on spiral galaxy. Some of ... Full Story

Astronomy Picture of the Day

Astronomy Picture of the Day

      eta Oph: Runaway Star Credit: NASA, JPL-Caltech, WISE Team Explanation: Like a ship plowing through cosmic seas, runaway star Zeta Ophiuchi produces the arcing interstellar bow wave or bow shock seen in this stunning infrared portrait from the WISE spacecraft. In the false-color view, bluish Zeta Oph, a star about 20 times more massive than the Sun, lies near the center of the frame, moving toward the top at 24 kilometers per second. Its strong stellar wind ... Full Story

Page 8 of 11« First...78910...Last »