Go Stargazing! June Edition

Saturn
Creative Commons License photo credit: Elsie esq.

Saturn is the only planet visable to us at night this June.  Face south at dusk, and you’ll see Saturn near a star of similar brightness — Spica in Virgo.  Saturn is significantly higher in the sky than Spica and a bit to its right as you face south.   The ringed planet is now well placed for evening viewing, and remains in the evening sky until late September 2011.

Mars and Jupiter are now higher in the pre-dawn sky.  Jupiter, set against a background of very dim stars, dominates the eastern sky at dawn.  Mars is dimmer and much lower in the east northeast.  It has fully emerged from the sun’s glare, however, and will brighten slightly each morning.  Venus does not rise until morning twilight.  Look for it very low in the east northeast as day breaks.

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, 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 2011:

New Moon                    June 1, 4:02 p.m.

1st Quarter                  June 8, 9:09 p.m. 

Full Moon                     June 15, 3:12 p.m.

Last Quarter               June 23, 6:48 a.m.

Red Light...
Sunset
Creative Commons License photo credit: Kıvanç Niş

The full moon of June 15 passes through the Earth’s shadow, causing a total eclipse of the Moon. Unfortunately, we miss out on that one, too, as the eclipse occurs during our daylight hours.  Anyone in the Eastern Hemisphere, though, can observe a central (and therefore especially long) total eclipse of the moon. 

At 12:17 p.m. on Tuesday, June 21, the sun is directly overhead at the Tropic of Cancer, the farthest point north where this is possible.  This makes the midday sun as high in our sky as possible and gives us more daylight than on any other day of the year.  This moment is, therefore, the summer solstice.  However, the earliest sunrise for us is the morning of June 11 and the latest sunset is on June 30.  Those of us who sleep through sunrise and witness sunset may get the impression that the days are lengthening all the way to the end of the month.

By popular demand, our George Observatory will open to the public not only on Saturdays, but also all Friday nights in June and July (except July 8).  The Discovery Dome, our traveling planetarium, will be set up each of these Fridays to show films throughout the evening.

Go Stargazing! June Edition

Jupiter
Creative Commons License photo credit: KingArthur10

Sautrn remains well placed in the evening sky this month.  Look for it in the south-southwest at dusk. 

Jupiter, in the south at dawn, is the brightest thing in that part of the sky unless the Moon is nearby (as it is on June 13.) 

Venus is a dazzling morning star this month.  Look east right as day begins to break for the brightest thing there except for the Moon.  Venus remains the ‘morning star’ for the rest of 2009. 

Mars is a little higher in the east at dawn than it has been.  Still, it remains fairly dim.  On the morning of Sunday, June 21, Venus passes within two degrees of Mars.  Look for Mars slightly above Venus and to its left.  This is quite a mismatched pair; Venus is about 100 times brighter than Mars. 

Look high in the west at dusk for stars in the shape of a backwards question mark, with a right triangle to the left of that.  These stars are in Leo, the Lion.  Saturn is under the ‘right angle’ in that right triangle.  The Big Dipper is highest on spring evenings.  From the Big Dipper’s handle, you can “arc to Arcturus.”  Arcturus, in the east at dusk, is the fourth brightest star we ever see at night and will be the brightest star in our night skies during all of June and July. Continuing the curve of the Big Dipper’s handle past Arcturus, you can “speed on to Spica,” a star low in the southeast at dusk.  Spica represents a stalk of wheat held by Virgo, the Virgin, who is in fact the harvest goddess.

Rising in the southeast at dusk is Antares in Scorpius, the Scorpion.  This is a red super-giant star about 700 times as wide across as our Sun.  In the northeast, the Summer Triangle is entering the evening sky.  Vega, the brightest of the triangle’s three stars, is already up at dusk.  The other two stars, Deneb and Altair, are up by 11:00 on June 1.  By month’s end, the whole triangle rises at dusk. 

Moon Phases in June 2009:

Full                                    June 7, 1:11 pm
Last Quarter                  June 15, 5:15 pm
New                                   June 22, 2:35 pm
1st Quarter                     June 29, 6:28 am

Golden Light
Creative Commons License photo credit: Paulo Brandão

At 12:45 am on Sunday, June 21, the Sun is overhead at the Tropic of Cancer and thus is as high as possible in our skies.  This is the summer solstice.  Here in the Northern Hemisphere, we have more daylight on this date than on any other date of the year. 

However, the earliest sunrise occurs on June 11, while the latest sunset is June 30.  Since most of us sleep through sunrise and witness sunset, the days seem to lengthen slightly until the end of the month, when in fact they begin getting shorter after the 21st.  As we approach the summer solstice each year, the Sun appears higher and higher in our skies.  As a result, it takes a longer apparent path across our skies; sunsets occur later and sunrises occur earlier throughout the spring.  But there is very little change in the Sun’s apparent height near the solstice itself.  For example, the Sun is already 82.33333 degrees high at midday in Houston; it will be 83.6666667 degrees high at midday on the solstice.  With such little change in the Sun’s height in June, a different effect dominates—the equation of time.  From June 11-30, both sunrise and sunset get a little later each day. 

Click here for more on the equation of time.

One tough decision…

For those of you who read my first blog, you will note that I decided to make use of some of those old camp diaries that are just collecting dust at home rather than inform everyone how great the weather is this week.  So along those lines, here is my second contribution.

I was about halfway through my Master’s thesis program at the time this account was written.  During the early 1990s I struggled, as some grad students do more than others, with the various personal relationships I was in (graduate advisors to girlfriends – you name it!), struggled with finding a respectable thesis project (I knew it would be something involving Neotropical Mammalogy, and it was in the end), and above all, the struggle to do what is right. 

While this latter challenge became easier for me with age and experience, I think part of the reason it is so much more challenging at a younger age is because you are exposed to so many different strong yet influential personalities – characters that mold the sort of person you turn out to be for the duration of your life.  As you can guess, I was (and still am today) exposed to a great variety of folks, some true heroes and others not so much. 

This story takes us back to a remote village in east-central Mexico amidst beautiful tropical montane forest.  The subject matter revolves around a species of Neotropical bat – my fascination with these magnificent creatures was strongly influenced through two legends in our discipline, Robert J. Baker and J. Knox Jones, Jr.  These Horn Professors at Texas Tech University were strong influences on my character and dedication to the field.  In fact Robert and I collaborate on projects today, and Knox, though deceased, lives every day in my memory, as we named our son, Levi Knox Brooks, in his honor.

-DB, 13 August 2008

 El Cielo (Photo by D.M. Brooks)

One tough decision…

~25 May 1992
Alta Cime, El Cielo Biosphere Reserve, Tamaulipas, Mexico

I couldn’t believe it was already close to midnight.  We were sitting around the table in a small one-room dwelling with dirt floor, rough wooden table in the center, and the flickering light provided by a kerosene lantern in the corner.  The sheriff of the township of Alta Cime was out making his night-time rounds.  His two children were fast asleep, wrapped up in their blankets on the floor.  Sitting around the table were his wife, my counterpart Jorgito, my charming assistant Sue, and me.  Nobody had said anything for a long time – 10 minutes of silence with a strong judicial overbearing seemed like hours.  In my hand was a small cloth bag containing a living organism – a young bat that was dredging up our collective four ideologies, trying to find resolve what had become a huge thorn in our summed moral consciousness, which grew heavier by the minute…

It was my first trip to study Neotropical bats, and my first trip to this region of Mexico.  Sue and I headed south from Lubbock, stopping overnight in Junction along the banks of the south fork of the Llano River in the beautiful Texas Hill Country.  After the usual several hour delays with hassles at the border with customs officers, we were finally on our way to the southern region of the beautiful state of Tamaulipas. 

Our destination was what at the time was a brand new Biosphere Reserve called El Cielo (or del Cielo; 22055’30”-23025’50” N, 99095’50”-99026’30” W), located just south of the Tropic of Cancer.  Although this region had been worked actively by (mostly American) scientists for several decades prior to our arrival, it was not made an official protected reserve zone until recently.  [Incidentally, today El Cielo is visited far and wide by birdwatchers from all over the globe, as it is only a six hour drive south of the Texas border.]  The Biosphere Reserve model has three broad zones: a human use area on the periphery, a controlled use area in the middle, and in the core – a pristine reserve restricted to scientists traveling by foot or horseback (no vehicles allowed!).

Our first site to net bats was in the core of the reserve at around 4,200 feet in altitude.  It was a long hike in and a long hike out, but worth it when we arrived, as the habitat was absolutely stunning tropical montane forest.  Unfortunately, the rain during the evening our bat nets were erected yielded only a single specimen of a small fruit-eating bat (Dermanura [a genus which today is considered Artibeus]). 

Our second site at Los Cedros (~900 feet) was where the main field station was located for the reserve.  We strung several mist-nets along tropical forest edge, which yielded a great diversity of lowland, primarily fruit-eating bats, including two species each of fruit-eating bats (Artibueus jamaicensis and A. lituratus) and yellow-shouldered bats (Sturnira lilium and S. ludovici), and of course, our token blood-sucker – the omnipresent common vampire bat (Desmodus rotundus). 

The two species of Sturnira were virtually indistinguishable, and could only really be keyed out by examining the ridge of their lower incisors (whether the incisors were dilobate or trilobate).  What was going through the minds of our entomologist colleagues I could only imagine, as we pried open the little bat’s mouth with one hand, holding the bat still with the same hand, holding a pocket-sized magnifying glass with the other hand, and illuminating our ‘work space’ with a headlamp, all the while trying not to get bit!

photo by L. Siles
 Common vampire bat
(Photo by L. Siles)

Our final site, the township of Alta Cime (~3300 feet) was met with excitement as Los Cedros proved so productive!  We immediately sought out the town sheriff / mayor / administrator, for just as in many of the old westerns, the head cheese of a given town often wears many hats.  We told him why we were there, and he kindly offered us a spacious and surprisingly clean abandoned goat shed to make camp in and devour our cans of spam and refried beans.  He said he would not be around in the evening, as he had to make the rounds, but kindly extended the invite to use the backyard of his own ranch house. 

We went ahead and accompanied him to his backyard, which contained pigs, poultry, and a small garden with large trumpet-vine flowers.  While it didn’t appear to be much, we went ahead and obligingly strung our bat nets, which proved surprisingly productive as the evening rolled in.  The pigs and poultry, respectively, lured in both common (D. rotundus) and hairy-legged (Diphylla ecaudata) vampire bats.  The deep corolla-tubed flowers lured in a nectar-feeding bat called the Mexican hog-nosed bat (Choeronycteris mexicana), which had never been recorded in the reserve!

So there we sat, around the table dimly illuminated by kerosene lamp.  In my hand I held a small cloth sack which fit comfortably in the palm of my hand.  The sack contained a young male hog-nosed bat; we could tell it was a young bat because the finger knuckles were swollen as the bone joints were not fully fused (un-ossified phalanges).  And thus began the dilemma – this species of bat had never been recorded in the reserve before, but in order to make the record official we had to sacrifice the bat to prepare as a museum voucher specimen. 

As a young grad student affiliated with the Museum at Texas Tech University, I had sacrificed and prepared quite a few study specimens, but none were necessarily of species that were rare in nature.  We found many reasons to sacrifice the little bat and many reasons to set it free.  Our morals were in a hyper-state of flux – well, Choeronycteris is not considered Endangered so it should be fine to collect it; but it has to be rare, otherwise it would have been collected before; but then again, as budding young scientists it would be great to prove our worth by documenting a new species for the reserve; but could we keep our dignity if the species was in fact rare, all for the sake of a published note?  What to DO? what to do…  [What would you have done?]

Post-log (13 August 2008): In the end we set the little bugger go.  Perhaps this was the right decision (if you believe in karma?), as I have gone on to document much more relevant records in the years that have ensued, including new state records, regional records, country records, and most importantly, new species.  At such an early stage of my career, the fate of this little bat that evening in Alta Cime proved an incredibly tough decision.  Such decisions became less difficult with time, and in the years that followed I collected and prepared many specimens.  But I will never forget the complex issues each of the four of us mulled over that evening in Mexico’s newest reserve, over the fate of a young nectar-feeding bat.