Seeing Stars with James Wooten: The Summer Triangle is high in the sky

This star map shows the Houston sky at 10 pm CDT on July 1, 9 pm CDT on July 15, and dusk on July 31.  To use the map, put the direction you are facing at the bottom. The Summer Triangle is high in the east.  This consists of the brightest stars in Cygnus, Lyra, and Aquila.  Scorpius, the Scorpion, is in the south, with the ‘teapot’ of Sagittarius to his left.  Leo, the Lion, sets in the west.  From the Big Dipper’s handle, ‘arc to Arcturus’ and ‘speed on to Spica’ in the southwest.  Watch Mars close in on Saturn this month.

This star map shows the Houston sky at 10 p.m. CDT on July 1, 9 p.m. CDT on July 15, and dusk on July 31. To use the map, put the direction you are facing at the bottom.
The Summer Triangle is high in the east. This consists of the brightest stars in Cygnus, Lyra, and Aquila. Scorpius, the Scorpion, is in the south, with the ‘teapot’ of Sagittarius to his left. Leo, the Lion, sets in the west. From the Big Dipper’s handle, ‘arc to Arcturus’ and ‘speed on to Spica’ in the southwest. Watch Mars close in on Saturn this month.

This month, Mars is in the southwest at dusk this month. Mars continues to fade a little each night as Earth continues to leave it farther behind. Still, Mars rivals the brightest stars we see at night.

Saturn is also in the southwest at dusk. This month and next, Mars approaches Saturn more and more. 

Venus remains in the morning sky. Look east at dawn for the brightest point of light there; only the Sun and Moon outshine Venus. Venus remains a morning star for almost all of 2014.

Jupiter is behind the Sun and out of sight this month. 

The Big Dipper is left of the North Star, with its handle pointing up. From that handle, you can ‘arc to Arcturus’ and then ‘speed on to Spica’; those stars are in the west at dusk. Leo, the Lion, is setting in the west at dusk.

Antares, the brightest star of Scorpius, the Scorpion, is in the southeast, with the ‘teapot’ of Sagittarius rising behind it. The Summer Triangle has fully risen in the northeast. The stars of summer are here.  

Moon Phases in July 2014:

1st Quarter: July 5, 7:00 a.m. 
Full: July 12, 6:26 a.m.
Last Quarter: July 18, 9:09 p.m.
New: July 26, 5:42 p.m.

At about 7 p.m. on Thursday, July 3, Earth is as far from the Sun as it will get this year. This is aphelion, when Earth is 94.56 million miles from the Sun, as opposed to the average distance of 93 million miles. On January 4, Earth was at 91.44 million miles from the Sun; that was perihelion (closest approach to the Sun). It turns out that this variation in the Earth-Sun distance is too small to cause much seasonal change. The tilt of Earth’s axis dominates as it orbits the Sun. That’s why we swelter when farther from the Sun and shiver when we’re closer. 

Click here to see what’s happening this month in the Burke Baker Planetarium

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!

Seeing Stars with James Wooten: Break out the sunscreen, ’cause here comes the Summer Solstice

This star map shows the Houston sky at 10 pm CDT on June 1, 9 pm CDT on June 15, and dusk on June 30.  To use the map, put the direction you are facing at the bottom.  Jupiter sets in the west in Gemini, the Twins. The Big Dipper is as high as it gets in the north. Leo, the Lion, is high in the west at dusk. From the Big Dipper’s handle, arc to Arcturus and then speed on to Spica in the south.  Saturn left of Spica in Libra.  Cygnus, Lyra, and Aquila form the Summer Triangle in the east, as Scorpius and Sagittarius rise in the southeast.  Summer has arrived.

This star map shows the Houston sky at 10 p.m. CDT on June 1, 9 p.m. CDT on June 15, and dusk on June 30. To use the map, put the direction you are facing at the bottom. Jupiter sets in the west in Gemini, the Twins. The Big Dipper is as high as it gets in the north. Leo, the Lion, is high in the west at dusk. From the Big Dipper’s handle, arc to Arcturus and then speed on to Spica in the south. Saturn is left of Spica in Libra. Cygnus, Lyra, and Aquila form the Summer Triangle in the east, as Scorpius and Sagittarius rise in the southeast. Summer has arrived.

This month, Jupiter remains in the evening sky for one more month. Look for it low in the west at dusk, outshining all the stars we ever see at night. 

Mars is in the southwest at dusk this month. Mars continues to fade a little each night as Earth continues to leave it farther behind. Still, Mars rivals the brightest stars we see at night.

Saturn was up all night long last month. Now, it remains well-placed for evening observing. Look low in the southeast at dusk.

Venus remains in the morning sky. Look east at dawn for the brightest point of light there; only the Sun and Moon outshine Venus. Venus remains a morning star for almost all of 2014.

The Big Dipper is above the North Star, with its handle pointing up. From that handle, you can ‘arc to Arcturus’ and then ‘speed on to Spica’; those stars are in the south at dusk.  Leo, the Lion, is high in the west at dusk.

Antares, the brightest star of Scorpius, the Scorpion, is in the southeast, with the ‘teapot’ of Sagittarius rising behind it. The Summer Triangle has fully risen in the northeast.  The stars of summer are here.  

Moon Phases in June 2014:

1st Quarter: June 5, 3:40 p.m. 
Full: June 12, 11:13 p.m.
Last Quarter: June 19, 1:39 p.m.
New: June 27, 3:09 a.m.

 

Summer Solstice 2014

At 5:51 a.m. on Saturday, June 21, the Sun is directly overhead at the Tropic of Cancer — the farthest point north where the Sun can be overhead. This therefore marks our summer solstice. On this date, those of us in the northern hemisphere experience the longest day and shortest night of the year, and the midday Sun is as high as possible in the sky. From the Southern Hemisphere, the Sun is as low as possible in the sky on June 21. Folks down there have their shortest day and longest night on their winter solstice. 

Interestingly, we see our earliest sunrise on June 11 and latest sunset on July 1. These are not on the solstice because Earth does not orbit the Sun at constant speed. Rather, Earth speeds up a little near perihelion (January) and slows down a little near aphelion (July).  Thus, for a period extending 10 days before and after the solstice, both sunrise and sunset occur a little later each day. (This close to the solstice, the difference in the height of the Sun each day changes only imperceptibly, allowing this small secondary effect to dominate). As most of us sleep through sunrise and are awake at sunset, days will seem to lengthen all the way through June.

Looking for a cool way to ring in the summer heat? Come out for our Summer Solstice party (part of our Mixers & Elixirs series) on June 21!

Want to learn more about the night sky? Click here for the HMNS 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!

Comet ISON Sprouts a Double Tail

Today’s guest post is written by John Moffitt, Astrophysicist & HMNS Volunteer.

Amateur astronomers are getting a better look at Comet ISON as it dives toward the sun for a Nov. 28th close encounter with solar fire. As the heat rises, the comet brightens, revealing new details every day. This photo, taken Nov. 10th by Michael Jäger of Jauerling Austria, shows a beautiful double tail. One tail is the ion tail. It is a thin streamer of ionized gas pushed away from the comet by solar wind. The filamentary ion tail points almost directly away from the sun.

Comet Ison gets a double tail - 111013 - crop

The other tail is the dust tail. Like Hansel and Gretel leaving bread crumbs to mark their way through the forest, ISON is leaving a trail of comet dust as it moves through the solar system. Compared to the lightweight molecules in the ion tail, grains of comet dust are heavier and harder for solar wind to push around. The dust tends to stay where it is dropped. The dust tail, therefore, traces the comet’s orbit and does not point directly away from the sun as the ion tail does.

Comet ISON is currently moving through the constellation Virgo low in the eastern sky before dawn. Shining like an 8th magnitude star, it is still too dim for naked eye viewing, but an increasingly easy target for backyard optics. Amateur astronomers, if you have a GOTO telescope, enter these coordinates.

Four comets visible in the pre-dawn eastern sky. Look with binoculars before the sun comes up.

4 comets skymap - 111213

Comet ISON Briefings at HMNS

November 29 – December 1

To find out whether Comet ISON survives its close encounter with the Sun and how to see it in December’s morning sky, come to the Burke Baker Planetarium Friday through Sunday of Thanksgiving weekend. An ISON update will precede each Planetarium show!
PLANETARIUM LECTURE
“Tracking Comet ISON and Other Possible IMPACTS”
Thursday, December 5, 6 p.m.
Tickets $18, Members $12
Comets and asteroids that roam the inner solar system and are a possible threat to Earth. Comet ISON will be grazing the Sun on November 28, and if it survives, it may come within our view. Dr. Sumners will give an update on Comet ISON and other incoming objects. Includes viewing of the show Impact!

Click here for tickets and more information on the Comet ISON briefings.

Plunge 4,000 feet deep from your seat at Nautilus Live this week — it’s shipwreck time

Beginning last Wednesday, July 17 through this Thursday, July 25, the Nautilus and her two ROVs, Hercules and Argus, will be exploring a shipwreck located in the Gulf of Mexico. The wreckage site was discovered by Shell Oil while scanning a lease location. Because the ship has not yet been identified, it is being called the “Monterrey Shipwreck,” after Shell’s name for their proposed project.

The site will be the deepest shipwreck to be systematically investigated in the Gulf of Mexico. Due to its depth, the wreckage cannot be explored through usual means (through the use of SCUBA teams).

That is where Hercules and Argus come in. A team of scientists will be able to safely view and analyze the site from the Nautilus as it bobs more than 4,000 feet above the actual wreckage.

Nautilus Live

This particular shipwreck is referred to as “time capsule” wreckage. The ship is suggested to be extremely well preserved due to how deep it is and the lack of nearby oil and gas infrastructure. Using sonar data, the site appears to be tightly contained and an outline of a hull that is 84 feet long and 26 feet wide can be seen.

The goal of this project is to thoroughly map and document the wreck site while also recovering artifacts for analysis and exhibition. The team on the Nautilus is hoping to answer several questions about the wreckage: What is it? Whose ship was it? Why was it out on those particular waters? How was it lost? What caused it to sink? All of these answers may rewrite history and clarify forgotten events in the history of the Gulf of Mexico.

As exciting as studying a newly discovered ship wreck might be, the adventures of the Nautilus as well as Hercules and Argus don’t stop there. Over the next several months, the Nautilus will be studying several fascinating underwater sites. This includes visiting the deepest point in the Caribbean and studying an underwater mountain. The research team will also work off the coast of Puerto Rico and analyze the site of a 7.2 underwater earthquake that caused a tsunami!

They will also be studying underwater volcanos, including Kick’ em Jenny, the most active and dangerous underwater volcano in the Caribbean Sea. Experience these findings with the team from the Nautilus live in the Burke Baker Planetarium here at the Houston Museum of Natural Science.

Be transported to the ocean floor each day at 1 and 3 p.m. via telepresence technology and rove the sea bottom, making discoveries and interacting live with the Nautilus research team. For more information on this exclusive partnership and to purchase tickets online, click here.