Saturday is STEM/Nova Day for Scouts at HMNS!

Hey, Scouts! Spend the day at HMNS this weekend and work on earning your Nova Award during STEM/Nova Day! The Houston Museum of Natural Science is the perfect place to complete your badge requirements. Visit our permanent exhibit halls, watch a Burke Baker Planetarium or Wortham Giant Screen Theatre movie, and ask some of our docents your best science questions!


Cubs and Webelos can work on their requirements for the “Science Everywhere” or the “Down and Dirty” Nova Awards. Watch one of our films about geology, oceanography, or weather, and explore permanent exhibit halls like the Weiss Hall of Energy and the Morian Hall of Paleontology. Wolf Scouts can sign up for Digging in the Past, and Webelos can choose from Adventures in Science, or Earth Rocks! classes. Bear Scouts can take one of our fall classes to finish their Nova Award requirements. We’ll also have Investigation Stations in the Alfred C. Glassell, Jr. Hall (under the fish) so you can explore different scientific topics through hands-on activities!


Boy Scouts will also be able to fulfill some of their “Shoot!” Nova Award requirements. Visit the Burke Baker Planetarium or Wortham Giant Screen Theatre to watch a movie about weather, astronomy, or space technology. Stop by some of the Investigation Stations to participate in hands-on activities involving physics and engineering. (Please note that Boy Scouts will be unable to fulfill every requirement for the “Shoot!” Nova Award at this event.)

STEM/Nova Day will be from 9 a.m. to 1 p.m. on Saturday, Sept. 26. If you are taking a class to complete any Nova requirements, classes will run from 1 to 3 p.m. Scouts can also get field trip rates for the Burke Baker Planetarium and Wortham Giant Screen Theatre shows that day. Participation in STEM/Nova Day requires admission to the permanent exhibit halls. Become a member and get free admission to the permanent exhibit halls year-round!

We look forward to seeing scouts at the STEM/Nova Day at HMNS!

Seeing Stars with James Wooten: Total Lunar Eclipse this Month


Saturn is now in the southwestern sky at dusk. It outshines the stars around it, so it’s also easy to see. 

Mars is a little higher in the morning sky this month. Look for it low in the east at dawn. Mars remains dimmer then average, though, and won’t rival the brighter stars until next spring.  

Venus and Jupiter reappear in the morning sky this month. Venus is already visible in the east at dawn; Jupiter will join it after the middle of the month. Venus outshines everything but the Sun and the Moon, while Jupiter is next brightest after Venus. Both, then, easily outshine all the stars we see at night and are clearly visible even in twilight.

Venus, Mars, and Jupiter will come close together in the sky late next month.

The Big Dipper is left of the North Star, with its handle pointing up. From that handle, you can ‘arc to Arcturus’ in the west at dusk. 

Antares, brightest star of Scorpius, the Scorpion, is in the southwest, with the ‘teapot’ of Sagittarius to its left. Saturn is to the right of the scorpion’s head. The Summer Triangle is overhead. The Great Square of Pegasus is now in the east, indicating the approaching fall.


Moon Phases in September 2015:

Last Quarter: Sept. 5, 4:54 a.m.

New: Sept. 13, 1:41 a.m.

First Quarter: Sept. 21, 3:59 p.m.

Full: Sept. 27, 9:50 p.m.

The Full Moon of September 27 enters the Earth shadow, causing a total lunar eclipse. Partial eclipse begins at 8:07 pm CDT, about an hour after sunset and right as twilight fades. The Moon is totally eclipsed by 9:10. Totality lasts 74 minutes, until 10:24. The Moon then comes out of eclipse until the eclipse is over at 11:27. This is the last of a series of four total lunar eclipses in 2014-2015, all visible from Houston. Unlike the previous three, which occurred at midnight or at dawn, this eclipse takes place in evening hours while everyone is still awake. Remember, whoever can see the Moon can watch the eclipse. Let’s hope the weather cooperates and we can all enjoy it. Our George Observatory will be open Sunday evening, September 27, for this event.

If we miss this eclipse, the next one we can see is at dawn Jan. 31, 2018.

At 3:21 a.m. on Wednesday, Sept. 23, the Sun is directly overhead at the equator, shifting southwards. This, then, marks the autumnal equinox, the ‘official’ start of fall. On this date (and on the spring equinox in March) everyone on Earth has the same amount of daylight.  After this date, night is longer than day for us and keeps getting longer until our longest night at the winter solstice. Below the equator, day becomes longer than night after this equinox. It is springtime down there. 

Planetarium Schedule

On most clear Saturday nights at the George Observatory, you can hear me do live star tours on the observation deck with a green laser pointer. If you’re there, listen for my announcement.

Clear Skies!

New images from Pluto break our hearts, excite our imaginations

Pluto has a heart. A big, icy heart surrounded by a sea of red. It was more of a fluke of photographic composition, a perfect angle for the shot that astronomers and engineers waited for more than nine years to receive, but nonetheless the image has served to anthropomorphize the dwarf planet enough to make us fall in love with it all over again.


Identified by Clyde Tombaugh in 1930 as the ninth planet from the sun, Pluto fell from grace in 2006 when the International Astronomical Union contentiously demoted it to a dwarf planet, but it never fell from our imaginations. Pluto occupies the same region of space as peers of similar or greater size, including the more massive dwarf planet Eris, and now that we see it has a heart, we imagine it breaking.

Pluto is a lonely wanderer, its elliptical flying well above and below the main plane of the solar system and within the orbit of Neptune. Tuesday morning, the historic images from NASA’s New Horizons space probe revealed its pockmarked face, wrinkled with valleys and mountains, and blanketed in sheets of ice, supporting the character we have imagined over the past 85 years. No less an idiosyncratic body than Jupiter, Saturn, or our own life-supporting Earth, Pluto’s face, now lifted out of obfuscation, reminds us of the magic of other worlds and reignites the spark of possibility.


Clyde W. Tombaugh. Wikipedia Commons.

Not only have we become closer to this famous (and infamous) planetoid during the nine-year journey of the New Horizons, we have also succeeded in slinging a piece of engineering three billion miles at speeds greater than 30,000 miles per hour, maintained control through the veil of a four-hour lag time, and captured high-resolution photos. The images of Pluto represent the scientific precision of which we are now capable in 2015. Dr. Carolyn Sumners, Vice President of Astronomy and Physics at the Houston Museum of Natural Science, explains this feat in terms of scale using objects familiar to Houstonians.

“If the sun were the Astrodome, the Earth is a ball the diameter of a tall person in Pasadena, and Pluto is a ball about a foot in diameter out close to Amarillo. We aimed, and we hit it,” she said, adding that space is a very empty place.


HMNS hosted a flyby watch party in the Burke Baker Planetarium Tuesday, with streaming images from NASA.

To further complicate the logistics, engineers had to compensate for the movement of Pluto, looking into the distant future for the point of interception. They also factored in a slingshot around Jupiter, using its intense gravity to accelerate the probe to speeds much faster than it was launched.

“There’s a lot of very complicated, solid geometry and physics that went into the mission. That, to me, is the most impressive,” Sumners said.

Due to the four-hour delay, engineers had to send a command and cross their fingers for eight hours every time a button was pushed. Four hours out, four hours back. They could only trust in their math and hope that the spectrograph and camera were aimed at Pluto at the right time.

“We got our science right,” Sumners said. “That we can do something this technologically advanced that far away is amazing.”

Starry Night Express to Pluto banner

HMNS hosted a Pluto flyby watch party in the Burke Baker Planetarium, with guests including Fox News and KHOU. Beloved astrophysicist Neil deGrasse Tyson made a cameo appearance over the Internet from his seat at the American Museum of Natural History. Visitors watched via live video stream as New Horizons came within 7,767 miles of Pluto at 6:49 a.m. CT. Houston Public Media highlights the significance of the event to our city and to the United States.

As the data from New Horizons continues to stream in over the next few months and areas of Pluto become more visible, scientists will begin the process of identifying and naming features of the planet’s surface. A day after the flyby, with the first close-up images sent by New Horizons, NASA has discovered ice mountains 11,000 feet high, comparable in height to the Rockies, and now we know it snows. Imagine that.

mountains on pluto

Ice mountains on Pluto.

At HMNS, the Planetarium has altered its Starry Night Express programming with a new major focus on incoming images and data from New Horizons. Guests can now get updates on the latest information about our famous dwarf planet during Starry Night Express: To Pluto! Visitors to the museum’s George Observatory in Brazos Bend State Park on Saturday nights can see several planets with their own eyes and maybe even Pluto through the Gueymard Research Telescope if the night is perfect.

HMNS will host a lecture by Dr. Paul Schenk of the Lunar and Planetary Institute on the exploration of Ceres and Pluto Tuesday, August 11 at 6:30 p.m. Schenk, who is currently assisting NASA with Pluto research and was a participant in the Dawn mission to Vesta in 2011, will review the unprecedented explorations of the inner and outer solar system and share the top questions scientists hope to answer with the data they gather. Tickets $18, members $12.

Discover the impact of meteors with Dr. Kring on Asteroid Day

On Feb. 15, 2013, with no warning, an asteroid 20 meters in diameter and weighing more than the Eiffel Tower plunged into the Earth’s atmosphere over the Russian city of Chelyabinsk at speeds in excess of 19 kilometers per second. At such a high speed, the 14,000-ton object exploded at altitude, creating a flash 30 times brighter than the sun and panicking Siberian residents.


The Chelyabinsk meteor injured 1,500 people and damaged 7,200 buildings in 2013.

The air burst damaged 7,200 buildings and injured 1,500 people, mostly due to cuts from broken glass, but many reported ultraviolet burns similar to sun damage and blindness from the flash. It was not the impact that caused the most damage, but the explosion as it suddenly fell apart in the atmosphere, about 25 times more energy than the atomic bomb detonated over Hiroshima.


The impact crater caused by the Chelyabinsk meteor.

The largest meteor impact since the Tunguska event on June 30, 1908 that flattened 80 million trees, Chelyabinsk served as a grim reminder that asteroids still pose a credible threat to the planet the same way they did for the dinosaurs. A massive asteroid collided with the Earth 65 million years ago, bringing about the demise of megafauna like Tyrannosaurus rex and Triceratops, along with more than half of the plants and animals living in the late Cretaceous. Scientists agree the asteroid responsible for this mass extinction hit the Yucatan, causing the Chicxulub crater. And the threat remains, this time for us.


Dr. David Kring, the man who discovered and named the Chicxulub crater.

Dr. David Kring of the Lunar and Planetary Institute, the scientists who discovered and named the Chicxulub for a Mayan village near the center of the crater, will pay a visit to the Houston Museum of Natural Science on Asteroid Day, June 30, at 6:30 p.m. His lecture will examine methods to mitigate the threat of meteor impacts to humanity, and guests will have a chance to engage in a Q&A session during the lecture. The Burke Baker Planetarium will offer special screenings of Impact at 6 and 8 p.m., complimentary with a ticket to Kring’s lecture.

Join us to learn more about asteroid impacts and other phenomena on Asteroid Day. Survival favors the informed. Tickets $18, Members $12.