Tuesday, July 16, 2019
Monday, July 15, 2019
Sunday, July 14, 2019
Saturday, July 13, 2019
Today's Astronomy Picture of the Day is an anaglyph (three-dimensional image) of the ascent stage of the Eagle, the Lunar Module that first brought humans to the surface of another sphere. Fifty. Years. Ago.
Friday, July 12, 2019
Today's Astronomy Picture of the Day is an image of a class of galaxy known as "irregular", meaning it does not have the familiar spiral shape. What causes this shift in galaxies such as NGC 55 or our satellite galaxies of the Large and Small Magellanic Clouds. Passages or collisions with other galaxies? Galaxy-wide singularities? The Great Old Ones?
Thursday, July 11, 2019
Today's Astronomy Picture of the Day focuses on NGC 3242, popularly known as The Ghost of Jupiter. This "planetary" nebula is actually the remnant of a nova. Not as easily seen by the "backyard observer" are the extended waves of nebular matter outside the central nebula: sucessive shockwaves of gas traveling out from the central star.
Wednesday, July 10, 2019
Today's Astronomy Picture of the Day is a short video depicting the locations of the over 4,000 (yes, four thousand) planets (exoplanets) found outside of our solar system. These have been discovered using procedures such as microlensing, using both ground-based and space-based systems (such as Kepler and TESS).
Tuesday, July 9, 2019
Monday, July 8, 2019
Today's Astronomy Picture of the Day brings us an image built from data at the radio range (hence, not "visible" to the ordinary person). The MeerKAT array peers at the center of our galaxy to see what is lurking there. "Mouseover" the image in the link for details.
The MeerKAT is only the precursor for the Square Kilometer Array. Can't wait to find out what that learns when it comes online!
Sunday, July 7, 2019
Today's Astronomy Picture of the Day shows a partial (crescent) Saturn plus the long shadow cast by the planet upon the ring system. Views like these can only come courtesy of visitors that fly past (e.g., Pioneer or Voyager) or orbit (Cassini). Here's hoping somebody funds another orbiter like Cassini!
Saturday, July 6, 2019
Today's Astronomy Picture of the Day shows the point of totality during the solar eclipse of July 2, 2019. The image was taken from a rather unique vantage point: a chase plane which was following the shadow of the Moon during the eclipse.
Friday, July 5, 2019
Thursday, July 4, 2019
Wednesday, July 3, 2019
Today's Astronomy Picture of the Day is a short video showing one of the proposed missions for the next generation of solar system exploration. The Dragonfly mission would deploy a small helicopter to Saturn's moon Titan, home to an atmosphere with a rich and interesting chemistry, weather, lakes (just not of water) and possibly...life (?).
Tuesday, July 2, 2019
Today's Astronomy Picture of the Day is a processed image from the Hubble Space Telescope (there seems to be quite an industry of "amateur" astronomers working with data from professional instruments!) of NGC 1566, a face-on spiral in the constellation of Dorado (the "Dolphinfish"). Another beautiful spiral with dust lanes, blue clusters and red star-forming regions! I could look at these for hours and hours.
Monday, July 1, 2019
Sunday, June 30, 2019
Saturday, June 29, 2019
Today's Astronomy Picture of the Day is an image combining data from several instruments of Messier 83, The Southern Pinwheel, studded by dust lanes, blue star clusters and red star-forming regions.