Crepuscular Rays

Crepuscular rays over the rooftop.

Crepuscular rays or Sun rays are rays of sunlight that appear to radiate from the point in the sky where the sun is located. These rays, which stream through gaps in clouds or between other objects, are columns of sunlit air. Despite seeming to converge at a point, the rays are in fact near-parallel shafts of sunlight, and their apparent convergence is a perspective effect (similar, for example, to the way that parallel railway lines seem to converge at a point in the distance).

Crepuscular rays.
Crepuscular rays.

The images on this page were all taken on the evening of April 4, 2017. Including this one below of anticrepusculer rays. The sun rays seen below were captured directly opposite in the sky from the picture seen above.  Interestingly the rays  seem to converge where there is no Sun!

Anticrepuscular rays.
Anticrepuscular rays.

You can see more pictures like these on my blog site page devoted to crepuscular rays as well as other weather and atmospheric phenomenon including Solar Halos, Lunar Halos, Thunderstorms, Rainbows, Sundogs and others.

Comet 45P/Honda-Mrkos-Pajdusakova

As 2016 comes to a close corks will be popping and fireworks firing to be sure. But make sure in all the excitement you don’t miss the celestial fireworks!

There will be the opportunity for you to see periodic Comet 45P/Honda-Mrkos-Pajdusakova in the constellation Capricornus.  This comet has an orbital period of just 5.25 years that takes out to Jupiter’s orbit before plunging back toward the Sun.

The best time to view will be just after sunset on new years eve, December 31, 2016. The south-western sky will be filled with other great objects for you to observe besides the comet including the Moon, Venus, Mars and Neptune.

Comet P45
Comet 45P/Honda-Mrkos-Pajdusakova on December 31, 2016 at 6:00 p.m. CST as seen from DFW

The sky chart above shows Comet 45P at about 21 degrees above the horizon and roughly 5 degrees away from the Moon. This will make for great viewing with binoculars or a telescope.

In early February this comet will pass within 0.1 AU of the earth. It is predicted to reach maximum brightness of magnitude ~7 in early January.

Below is a broader view of the same area of sky on 12-31-2016 showing the other planets, Venus, Mars and Neptune which will also be visible.

Comet 45P and Planets.

Mars and Neptune will be mere 0.2 degrees a part and visible in the same field of view of a telescope.  Use high power eyepieces on Neptune to see it’s small blueish disk. Mars’ red color will be easily discernible.

Shining brightly at -4.4, Venus will be the show stopper. Known as the morning or evening star, as it never wanders far from the Sun from our vantage point, seen through a telescope Venus will appear as a gibbous disc that is about 60% sunlit.

So while the party is going on slip out into the cool or cold night air and view the big show of planets and comets. And take note, these celestial orbs will be setting about the time to red orb drops in NYC.

Happy New Year!

19th Annual North Texas Skywatch Star Party

North TX Sky Watch Star PartyThe 19th Annual North Texas Skywatch Star Party will be held at Lake Mineral Wells State Park on Saturday, October 22, 2016.

The park is located 50 miles west of Fort Worth.  This very popular family friendly star party (average attendance of 200) is hosted by Lake Mineral Wells State Park and Dr. Mike Hibbs of Tarleton State University.

NTSW Star Party 2014
NTSW Star Party 2014

The North Texas Skywatch Star Party will start at 7:00 PM and last as long as observers want to stay up. The intent is to give the residence of the North Texas a nearby meeting place and dark sky location to get together. “I hope that all of those with telescopes can stay and share views through their telescopes, or knowledge of astronomy, to those wanting a chance to learn and see for the first time.” The only cost is the normal State Park admission. You will be able to camp out for the night if you want. Come early and enjoy the park and have a cookout.  Lake Mineral Wells State Park is about 50 miles west of Fort Worth off of HWY 180.  Contact the Park for the entrance and camping fees and reservations.

Palo Pinto Mountains State Park Star Party

Palo Pinto Mountains State Park will be hosting a Star Party on Saturday, October 1, 2016. This is a free event that is open to the public.

Telescope area.
Telescope area.

Members of both the Texas Astronomical Society of Dallas and the Fort Worth Astronomical Society will be there with telescopes that you can use to view the night sky. Bring chairs, water, bug spray, and your own telescope if you would like.

ppmsp_2Directions: Exit I-20 at exit 361, go north on Hwy 16 four miles, turn West on FM 2372 for two miles and then follow the signs.

Total Solar Eclipse 2017 T-1 Year

Eclipse Mosaic
Eclipse Mosaic

Here we are less than 365 days until the total solar eclipse that will be seen from coast-to-coast in the U.S. on August 21, 2017.  This will be the first total solar eclipse to grace the U.S. mainland since 1979 and the first to sweep across the entire country since 1918!

animated map of the Moon's shadows across Earth
animated map of the Moon’s shadows across Earth

Before I go any further I want to say to all those reading this article who have never witnessed a total solar eclipse – please, please make every effort to get to the center line next summer and experience totality. Nothing compares to it. No words can adequately explain the awesome spectacle, the emotional response generated and grandeur of a total solar eclipse. You simply must experience it at least once in your lifetime.

Okay, now that I have that off my chest let me start by just being honest and upfront – eclipses are addictive! Watch one and you will probably find yourself gravitating to all the subsequent solar and lunar eclipses on the calendar. Eclipse chasers as they are called share a close bold with gold prospectors. Once the fever gets in your blood watch out, as you’ll be hooked for life.  That is not a bad thing.

Corona – total solar eclipse of February 26, 1998 from Aruba.

Now is the time to act! But wait?! The eclipse is a year away. Yes, it is but now is the time to plan your trip and make your travel arrangements. Is there a relative of yours that lives near the center line? Can we make a trip as a family to see this event even though it will take place right around the time many schools will be starting up, etc. There is work to be done to ensure you have all your bases covered and your plans ironed out. You do not want to wait until one, two or three months out to start making your travel plans. Trust me.

Photo credit: Astronomy Magazine
Photo credit: Astronomy Magazine

So as we proceed to countdown the days, weeks and months to what will most assuredly be referred to as “the great solar eclipse of 2017” I will be posting about this astronomical event and offering up important and timely information. My goal is to provide this information from a helpful perspective coming from an amateur astronomer who has seen a total solar eclipse with his own eyes and lived to tell about it.

So to recap, make your travel plans now for this eclipse. Do not wait. Now is the time to beat the masses and the last minute chaos and stress that goes with it.

Here are some helpful resources as you plan for the total solar eclipse of 2017.

  • The 2017 Total Solar Eclipse podcast – All about the upcoming total solar eclipse that will sweep across the U.S. on August 21, 2017. Listen to new programs and eclipse topics each week.
  •  Prepare for Totality 2017  is Astronomy Magazine’s page offering an interactive solar eclipse map of the path of totality (zoom in and out), eclipse facts, trip advice, helpful products, solar eclipse glossary, intro to safe solar viewing video as well as a free e-guide for download on the 2017 total solar eclipse.
  • 2017 Solar Eclipse Prime page – Fred Espenak “Mr. Eclipse” detailed discussion on the total solar eclipse of 2017. Your one stop shop for maps and information.
  • NASA’s Eclipse web site – This special web page contains preliminary information about the 2017 total eclipse of the Sun. It will be updated with more information as eclipse day approaches.

Perseid Meteor Shower Peaks Tonight

The 2016 edition of the Perseid Meteor Shower should be a good one. In most years the meteor shower produces 60 to 120 meteors per hour as seen under dark sky conditions but this year the Earth will be plowing through a more dense stream of cometary debris left behind by Comet Swift-Tuttle. On the morning of Friday, August 12th the shower peaks with up to 200 meteors per hour predicted.  NASA’s video below explains the Perseid meteor shower as well as other astro highlights for the month.

As the constellation Perseus rises in the northeast the Moon will be setting in the southwest at about 1:30 a.m. CDT here in the DFW area.  This will be the best time to begin watching for meteors.  Choose a location away from city lights. Use a reclining lawn chair so you and lean back and encompass as much of the night sky as possible. It’s not necessary to focus your gaze on the constellation Perseus.  All the meteors you see will appear to originate from this constellation if you were to trace them back to that point but you will be able to see meteors all over the sky. If you see a meteor that does not appear to trace back to Perseus in the northeast sky then you know you’ve seen a “sporadic” meteor (one not related to the current meteor shower).

Continue reading Perseid Meteor Shower Peaks Tonight

Rio Brazos Star Party @ Acton Nature Center

Rio Brazos Star Party
Rio Brazos Star Party

The Rio Brazos chapter of Texas Master Naturalists will be hosting a star party on Saturday September 10, 2016 from 8:00 to 11:00 p.m. at Acton Nature Center, 6900 Smoky Hill Ct. Granbury, TX 76049. There will be a guest speaker at the twilight program under the pavilion adjacent to the parking lot starting at 8:00 p.m. After the program attendees will take a short walk down the path to the farmhouse where we will have telescopes set up with sky guides to show you the night sky.

Please bring a blanket or chair to sit in, water to drink and enjoy the evening. Restrooms are available on site. We welcome anyone who is interested in sharing knowledge or telescopes with the public.

Sunset at Acton Nature Center

Current amateur astronomy information such as points of interest and events in the night sky, star party dates, educational information, telescopes buying tips and much more.