Wednesday, December 25, 2019

Deep Time

A good guide to finding good history. There's a lot of dodgy stuff out there: poorly researched, mainly a thin covering for a warped sense of politics. Take a step back with this article and seek out books that will inform you!

Sunday, October 20, 2019

Friday, October 18, 2019

The Outsider


Today's Astronomy Picture of the Day is a Hubble Space Telescope image of Comet 2I/Borisov, the second body to be recognized as an interstellar interloper coming in for a visit to our neighborhood.

Thursday, October 17, 2019

System in a System


Today's Astronomy Picture of the Day shows a Cassini Orbiter image which managed to capture five of the moons of Saturn (plus a bit of the rings) in one shot.

Wednesday, October 16, 2019

Tuesday, October 15, 2019

Dark Sky


Today's Astronomy Picture of the Day shows us what our dark and empty night sky would show us if we could "see" as well as our digital eyes.

Monday, October 14, 2019

The Busy Sky


Today's Astronomy Picture of the Day shows Messier 31, the Andromeda Galaxy. 300 images, each taken over 30 seconds were stacked. As a result, the quiet sky is streaked with meteors, satellites, airplane lights and more. "Mouseover" the image in the link to switch between the two versions: cleaned up and "natural" or see the second image below.


Sunday, October 13, 2019

Jewell Cluster


Today's Astronomy Picture of the Day shows NGC 290, an open cluster in the constellation of Tucana and is part of the Small Magellanic Cloud, one of the "satellite" galaxies that accompany The Milky Way.

Saturday, October 12, 2019

Two Perspectives


Today's Astronomy Picture of the Day shows our blue dot from two vastly different perspectives: Earth as seen from Saturn (900 million miles), Earth as seen from Mercury (61 million miles).

Friday, October 11, 2019

Thursday, October 10, 2019

Wednesday, October 9, 2019

Tuesday, October 8, 2019

Sunday, October 6, 2019

Saturday, October 5, 2019

Five Moons


Today's Astronomy Picture of the Day shows the waxing Moon and four more. Four? Look carefully and you'll spot Jupiter and four of the Galilean moons.

Thursday, October 3, 2019

Tuesday, October 1, 2019

Safety First!

Today's Astronomy Picture of the Day is a short (humorous) video about being safe around black holes. Safety first when traveling interstellar danger zones!

Monday, September 30, 2019

Hunter in Repose


Today's Astronomy Picture of the Day shows Orion the Hunter from the perspective of Brazil, where he seems to be somewhere between horizontal repose and starting to stand on his head (vs. my usual northern hemisphere perspective).

Sunday, September 29, 2019

Saturday, September 28, 2019

Thursday, September 26, 2019

da Vinci Glow


Today's Astronomy Picture of the Day shows the New Moon embraced in the arms of the Old Moon. The "dark side" of the moon (the night side) is lit by earthshine. Leonardo da Vinci was probably not the first to observe this, but was the first that we know of to write of it.


Wednesday, September 25, 2019

Making the Star Stuff


Today's Astronomy Picture of the Day shows IC 5070, The Pelican Nebula, in the constellation of Cygnus. We are all star stuff, especially stars, which are being created in regions such as this.

Tuesday, September 24, 2019

Martian Frosting


Today's Astronomy Picture of the Day shows the northern hemisphere of Mars, where frozen carbon dioxide and water are sublimating off dune fields. Poke around and find other images from the polar regions of Mars during this kind of event. There are some amazing images to be seen around this (let along the rest of the planet!).

Monday, September 23, 2019

Sunday, September 22, 2019

Warped Planet


Today's Astronomy Picture of the Day shows...a landscape warped by a close-passing singularity? Cosmic strings bending local space? A breakdown between dimensions? Stitched photos creating so-called Little Planet projections can get really mind-bending!

Saturday, September 21, 2019

Night Flowers


Today's Astronomy Picture of the Day shows the Tulip Nebula, found in the constellation of Cygnus (the Swan). The night sky is full of flowers.

Thursday, September 19, 2019

Traveling the Veil


Today's Astronomy Picture of the Day shows one portion of the Veil Nebula, an expanding supernova remnant in the constellation of Cygnus.

Tuesday, September 17, 2019

Water


Today's Astronomy Picture of the Day is an artist conception of K2-18b, an exoplanet around the star K2-18, near the constellation of Leo. What makes this exoplanet unique? A "significant amount" of water vapor has been detected at this exoplanet, a necessary component for life (as, they say, we know it).

Monday, September 16, 2019

Sunday, September 15, 2019

Friday, September 13, 2019

Thursday, September 12, 2019

Wednesday, September 11, 2019

Icy Heart


Today's Astronomy Picture of the Day shows IC 1805, The Heart Nebula, near the constellation of Cassiopeia. More like a cave, than a heart, to me.

Tuesday, September 10, 2019

A Bit of Pluto


Today's Astronomy Picture of the Day is a "true color" image of Pluto, as taken by the New Horizons 2015 vehicle. I'm still astounded by this, not only the mission (and the success of the mission), but these images. If only Clyde Tombaugh had been around to see this.


Monday, September 9, 2019

Spiral in Andromeda


Today's Astronomy Picture of the Day shows Messier 31, the Great Galaxy in Andromeda. Under dark backyard skies, you can see this galaxy as a hazy cloud in the night sky, with astronomical equipment and long exposure times, the structure of the galaxy comes into view.

Sunday, September 8, 2019

Saturday, September 7, 2019

The Lair of the Wolf


Today's Astronomy Picture of the Day shows the rich star fields, emission and reflection nebula, and young blue stars of Wolf's Lair, a nebular complex in the constellation of Cepheus.

Friday, September 6, 2019

Out of Old, New


Today's Astronomy Picture of the Day is a image that combines data from the Chandra X-Ray Observatory and the Hubble Space Telescope to show the debris cloud (containing gas, dust and even bits of heavier elements caused in the event) from the Cassiopeia A supernova.

Thursday, September 5, 2019

Under Southern Climes


Today's Astronomy Picture of the Day shows one of our nearest extra-galactic neighbors, The Large Magellanic Cloud, in the constellation of Dorado. This featured in a favorite science fiction tale of my misbegotten youth.