Search results
Results From The WOW.Com Content Network
Re: APOD: Mars: Moon, Craters, and Volcanos (2024 Sep 09) by wilddouglascounty » Mon Sep 09, 2024 2:30 pm. Depends on how you define "largest" I guess. In terms of volume, Olympus Mons still wins out, with a 2011 study estimating it contains around 4 million km2 of material, compared to Alba Mons' 2.5 million km2, Kinda like comparing a large ...
by APOD Robot » Thu Aug 29, 2024 4:05 am. Star Factory Messier 17. Explanation: A nearby star factory known as Messier 17 lies some 5,500 light-years away in the nebula-rich constellation Sagittarius. At that distance, this 1.5 degree wide field-of-view would span about 150 light-years. In the sharp color composite image faint details of the ...
APOD: NGC 247 and Friends (2024 Sep 05) by APOD Robot » Wed Sep 04, 2024 4:06 am. Explanation: About 70,000 light-years across, NGC 247 is a spiral galaxy smaller than our Milky Way. Measured to be only 11 million light-years distant it is nearby though. Tilted nearly edge-on as seen from our perspective, it dominates this telescopic field of ...
On a slightly more serious note, pay attention to the outer bluish strands of Simeis 147. These are typical of supernova remnants, as the gaseous debris that was flung out of the "ground zero" of the explosion crashes into the surrounding interstellar medium and makes it glow blue-green from doubly ionized oxygen, OIII.
The Horsehead Nebula is one of those pillars. What I specifically like about the APOD is all the "pillars" pointing at Sigma Orionis. Sigma Orionis is a hot O-type star, which, because of its harsh stellar wind and intense ultraviolet light, has cleared a "bubble" around itself. But at the margins of this bubble, "pillars" of gas and dust ...
by APOD Robot » Sun Sep 22, 2024 4:06 am. Explanation: Chicago, in a way, is like a modern Stonehenge. The way is east to west, and the time is today. Today, and every equinox, the Sun will set exactly to the west, everywhere on Earth. Therefore, today in Chicago, the Sun will set directly down the long equatorially-aligned grid of streets and ...
by APOD Robot » Sat Sep 07, 2024 4:05 am. Explanation: Mars has two tiny moons, Phobos and Deimos, named for the figures in Greek mythology Fear and Panic. Detailed surface views of smaller moon Deimos are shown in both these panels. The images were taken in 2009, by the HiRISE camera on board the Mars Reconnaissance Orbiter spacecraft, NASA's ...
by APOD Robot » Thu Feb 22, 2024 5:06 am. A View Toward M106. Explanation: Big, bright, beautiful spiral, Messier 106 dominates this cosmic vista. The nearly two degree wide telescopic field of view looks toward the well-trained constellation Canes Venatici, near the handle of the Big Dipper. Also known as NGC 4258, M106 is about 80,000 light ...
by APOD Robot » Sat Feb 26, 2022 5:05 am. Nearby Spiral Galaxy NGC 4945. Explanation: Large spiral galaxy NGC 4945 is seen nearly edge-on in this cosmic galaxy close-up. It's almost the size of our Milky Way Galaxy. NGC 4945's own dusty disk, young blue star clusters, and pink star forming regions stand out in the colorful telescopic frame.
by APOD Robot » Thu Sep 26, 2024 4:06 am. The Great Globular Cluster in Hercules. Explanation: In 1716, English astronomer Edmond Halley noted, "This is but a little Patch, but it shows itself to the naked Eye, when the Sky is serene and the Moon absent." Of course, M13 is now less modestly recognized as the Great Globular Cluster in Hercules ...