These great hollow globes of artificial super-metals, and artificial transparent adamant, ranged in size from the earliest and smallest structures, which were no bigger than a very small asteroid, to spheres considerably larger than the Earth. (Olaf Stapledon, STAR MAKER)
Wednesday, July 31, 2019
Eat Them Up, Yum
Today's Astronomy Picture of the Day brings us an image of IC 1795 in the constellation of Cassiopeia, resembling a fish head to some.
Tuesday, July 30, 2019
No Night Without Stars
Today's Astronomy Picture of the Day shows a nebular region seemingly without stars. They are there...they just haven't been born yet.
Monday, July 29, 2019
Sunday, July 28, 2019
Shifting
Today's Astronomy Picture of the Day brings us "visible" and infrared views of the North American Nebula in the constellation of Cygnus. "Mouseover" the image in the link to switch between the views.
Saturday, July 27, 2019
Fire To The Moon
Today's Astronomy Picture of the Day shows the Geosynchronous Satellite Launch Vehicle MkIII lofting India's Chandrayaan 2 mission (orbiter, lander and rover) to the Moon.
Friday, July 26, 2019
Tracery
Today's Astronomy Picture of the Day shows delicate cloud tracery across the sky as noctilucent clouds move over Sweden.
Thursday, July 25, 2019
Cygnus Starscape
Today's Astronomy Picture of the Day shows rich starfields and nebular shapes in the region of Cygnus the Swan.
Wednesday, July 24, 2019
Erosion of the System
Today's Astronomy Picture of the Day captures zodiacal light, dust in our solar system, possibly created by eroding comets (so to speak).
Tuesday, July 23, 2019
The Wind Between the Stars
Today's Astronomy Picture of the Day brings us Messier 82, the Cigar Galaxy, enhanced and processed to show filments of gas and dust being driven by a galactic superwind.
Monday, July 22, 2019
Shadow Crossing
Today's Astronomy Picture of the Day shows the shadow of the Earth crossing the face of the Moon during last week's lunar eclipse.
Sunday, July 21, 2019
Active Moon
Today's Astronomy Picture of the Day is from the Sea of Tranquility during the mission of Apollo 11. Buzz Aldrin stands near the deployed Passive Seismic Experiment. It seems that our "dead" moon is surprisingly active. What causes this activity? Meteor hits? Collapsing faults? Giant moon beasts?
Saturday, July 20, 2019
View from the Eagle
Today's Astronomy Picture of the Day is a panoramic view from Apollo 11's Lunar Module, Eagle in the Sea of Tranquility.
Why haven't we been back?
Friday, July 19, 2019
Tranquility Base
Today's Astronomy Picture of the Day is a panoramic view from Tranquility Base, landing site of Apollo 11 on July 20, 1969.
Why haven't we been back? Or gone further?
Thursday, July 18, 2019
Shadows
Today's Astronomy Picture of the Day shows the Moon, cast in a reddish light due to the shadow of the Earth, obscured by a shadowy mountain.
Wednesday, July 17, 2019
First Landing
Today's Astronomy Picture of the Day is a short video of the descent of Eagle (Apollo 11) to the Sea of Tranquility. (Artwork above by Robert McCall, depicting the descent, including inset views of what would have been seen from the windows of the Lunar Module. Artwork below by Pierre Mion showing the unexpected obstacle in the final part of the descent, when the Lunar Module came dangerously close to landing in a rock field)
Tuesday, July 16, 2019
Go For Launch
Today's Astronomy Picture of the Day is a short video showing the launch of Apollo 11, bringing humans to another sphere for the last time. Why haven't we been back?
Monday, July 15, 2019
Across the Bright Face
Today's Astronomy Picture of the Day shows the International Space Station moving across the quiet Sun, devoid of sun spots and mottling.
Sunday, July 14, 2019
Northern Eagle
Today's Astronomy Picture of the Day brings us an image of auroral activity over the skies of Norway. If might be worth the long winters just for such a sight!
Saturday, July 13, 2019
Dimensional Eagle
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
Irregulars
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
Halo Effect
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
Beyond the Home System
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
Shadows Against the Sun
Today's Astronomy Picture of the Day is from the August 2017 total solar eclipse. Were these birds as confused as some people were?
Monday, July 8, 2019
MeerKATs Online
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
Saturn's Shadow
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
Chasing Shadows
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
Eclipse Sequence
Today's Astronomy Picture of the Day shows the July 2, 2019 solar eclipse from first contact to last from the La Silla Observatory in Chile.
Thursday, July 4, 2019
In the Shadow of the Moon
Today's Astronomy Picture of the Day shows a lineup of eager photographers and observers catching the July 2, 2019 solar eclipse.
Wednesday, July 3, 2019
Dragonfly
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
Rich Fields
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
Coronal Activity
Today's Astronomy Picture of the Day shows coronal activity, solar prominences and even the faint face of the Moon in this image from the August 2017 solar eclipse.