Just A Sun-Day Drive Around the Galactic Neighborhood

This week I’m tackling the subject of our Sun’s motion through the Milky Way Galaxy and approximately how long one orbit is.

The Milky Way Galaxy has two major spiral arms, named the Perseus Arm and the Scutum-Centaurus Arm.  There are also smaller less pronounced arms, including the Sagittarius Arm, the Norma Arm, The Local Arm (aka the Orion Spur) and the Outer Arm.  Our solar system resides in the Orion Spur (Local Arm), branching off from the larger Perseus Arm.  During the summer months in the northern hemisphere, we predominantly observe the Sagittarius Arm, including the galactic center, which appears as steam from the Tea Pot asterism in the constellation Sagittarius.  (Gaherty, 2016)  Over the winter, we’re looking away from the galactic center and through the Perseus Arm.  (Comins, 396)

Artist’s concept of what astronomers now believe is the overall structure of the spiral arms in our Milky Way galaxy. The sun resides within a minor spiral arm of the galaxy, called the Orion Arm. Image via NASA and Wikimedia Commons.

Continue reading “Just A Sun-Day Drive Around the Galactic Neighborhood”

The Majority of Americans Can’t See the Milky Way Anymore

http://gizmodo.com/the-majority-of-americans-cant-see-the-milky-way-anymor-1781756700?utm_campaign=socialflow_gizmodo_twitter&utm_source=gizmodo_twitter&utm_medium=socialflow

http://www.theatlantic.com/science/archive/2016/06/pawnee-sky/486557/

Light pollution update.  Not looking good for looking up for 80% of us in the United States.

Tonight’s Adventure in Star Gazing with the Public

Tonight is my first night this year as a volunteer of the Astronomical Society of Kansas City in our public outreach efforts to introduce astronomical observing to the public.  Every Saturday night in May and through the end of October, we open up Powell Observatory to the public and provide education programs, solar observing, binocular observing and of course telescopic observing (weather and cloud cover permitting).  The weather forecast for this evening couldn’t be better.  See for yourself as we have our own weather station and sky cam broadcasting 24-hours a day.

Astronomy’s Sky this Week reports for tonight:

Saturday, May 14

•  The Moon moves approximately 13° eastward relative to the starry background every 24 hours, and its motion carries it near Jupiter this evening. From North America, the two appear within 5° of each other all night. They will be in conjunction at 6 a.m. EDT tomorrow morning, when our satellite passes 2° due south of the planet. Although the best views of the pair come with the naked eye or binoculars, don’t pass up the opportunity to observe Jupiter through a telescope. The giant planet’s disk currently spans 39″ and displays a wealth of atmospheric detail. All this week, Jupiter appears high in the south as darkness falls and doesn’t set until nearly 3 a.m. local daylight time. It shines at magnitude –2.2 — brighter than any other point of light in the night sky — against the backdrop of southern Leo.

While Sky and Telescope Sky at a Glance expands on: The two brightest things in the evening sky, the Moon and Jupiter, shine high just a few degrees apart this evening, as shown here. Third brightest is Mars, low in the southeast after dark.

So for a great time this evening, head south of Kansas City down US-69 to Louisburg and join me and several hundred other people as we take in the wonders of the night sky.

Keep Looking Up!

 

 

Hubble’s high-definition panoramic view of the Andromeda Galaxy | Astronomy.com

Mega coolness!

Andromeda Galaxy Hubble Closeup
NASA/ESA/J. Dalcanton/B.F. Williams/L.C. Johnson (University of Washington)/The PHAT team/R. Gendler

Never before have astronomers been able to see individual stars inside an external spiral galaxy over such a large contiguous area.

Hubble’s high-definition panoramic view of the Andromeda Galaxy | Astronomy.com.

Why “Critical Density” Could Determine the Fate of the Universe

http://io9.com/why-critical-density-could-determine-the-fate-of-the-1550168923?utm_campaign=socialflow_io9_twitter&utm_source=io9_twitter&utm_medium=socialflow

I don’t remember seeing Esther (the author of the above article) at last Saturday evening’s ASKC meeting and Dr. Feldman’s lecture on Dark Matter and Dark Energy … but I’ve seen that graph very recently.

Hmmm…

20140322_192901
Dr. Feldman and the Definition of Cosmology

Professor Hume A. Feldman, Ph.D.

Watch a staggeringly beautiful time-lapse video of Yosemite National Park

http://io9.com/5878091/this-time-lapse-video-of-yosemite-is-staggeringly-beautiful

I’ve been to Yosemite twice. I loved it. It would be the only reason I would ever move to California.

[vimeo 35396305 w=500 h=281]

Yosemite HD from Project Yosemite on Vimeo.

This stunning time lapse combines several of my favorite photography subjects into four breath taking minutes: sunrises, sunsets, moon rise, Milky Way with meteors, nature, landscapes, etc.

And if four minutes wasn’t enough, try the five minute sequel from Project Yosemite:

[vimeo 87701971 w=500 h=281]

Yosemite HD II from Project Yosemite on Vimeo.