Seeing Stars with James Wooten: Springing forward into Daylight Saving Time

This star map shows the Houston sky at 9 pm CST on March 1, 9 pm CDT on March 15, and 8 pm on March 31. To use the map, put the direction you are facing at the bottom. Jupiter is high overhead in Gemini, the Twins. Dazzling Orion, the Hunter is to the Twins’ lower right. To Orion’s left are the two Dog Stars—little dog Procyon and big dog Sirius. Sirius outshines all other stars we see at night. In the north, the Big Dipper is higher in the sky. Leo, the Lion, rises in the east. These stars, along with Arcturus, announce the coming spring. Mars now rises in late evening.

This star map shows the Houston sky at 9 p.m. CST on March 1, 9 p.m. CDT on March 15, and 8 p.m. on March 31. To use the map, put the direction you are facing at the bottom. Jupiter is high overhead in Gemini, the Twins. Dazzling Orion the Hunter is to the Twins’ lower right. To Orion’s left are the two Dog Stars: little dog Procyon and big dog Sirius. Sirius outshines all other stars we see at night. In the north, the Big Dipper is higher in the sky. Leo, the Lion, rises in the east. These stars, along with Arcturus, announce the coming spring. Mars now rises in late evening.

This month, Jupiter remains well placed for evening observing all winter and spring. Look for it almost overhead at dusk and high in the west later in the evening.

Mars remains in the morning sky. It continues to brighten a bit in the south at dawn. Later in March, it also begins rising in late evening (9:30 p.m. on March 5; 8:20 p.m. on March 31)

Saturn remains in the pre-dawn sky. Face south immediately before sunup to see it.

Venus has now entered the morning sky. Look southeast 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.

Brilliant winter stars shift toward the southwest during March. Dazzling Orion is almost due south at dusk. His three-starred belt is halfway between reddish Betelgeuse and bluish Rigel. Orion’s belt points up to Aldebaran in Taurus the Bull. This winter and spring, the Bull also contains Jupiter. To Orion’s upper left are the twin stars Castor and Pollux, marking the heads of Gemini, the Twins. You can find Sirius, the brightest star we ever see at night, by drawing a line from Orion’s belt towards the horizon. To Orion’s left, about level with Betelgeuse, is Procyon, the Little Dog Star.

From Sirius, look a little bit to the right and then straight down to the horizon. If your southern horizon is clear of clouds and tall earthly obstacles, you’ll see Canopus, the second brightest star ever visible at night. This star is so far south that most Americans never see it, and many star maps made in the USA omit it. (You must be south of 37 degrees north — the latitude of the USA’s Four Corners — for Canopus to rise). As you view Canopus, keep in mind that the sky we see depends on our latitude as well as on time of year and time of night.

Joining the winter stars are stars of spring rising in the east. Look for Leo the Lion at dusk. Later in the evening, extend the Big Dipper’s handle to “Arc to Arcturus“ and then “speed on to Spica;” these stars rise at about 10 p.m. in early March, but by 9 p.m. on the March 31.

Moon Phases in March 2014:
New:
March 1, 2:02 a.m.; March 30, 1:47 p.m.
1st Quarter: March 8, 7:26 a.m.
Full: March 16, 12:10 p.m.
Last Quarter: March 23, 8:47 p.m.

Sun., Mar. 9, is the second Sunday of the month. Accordingly, Daylight Saving Time begins at 2 am that morning. (The time goes from 1:59:59 to 3:00:00, with the 2 a.m. hour skipped.) Don’t forget to set your clocks forward one hour!

At 11:57 am on Thurs., Mar. 20, the Sun is directly overhead at the equator. That makes this the vernal equinox, one of two days when everyone on the planet has the same amount of daylight. Many consider this the ‘official’ start of spring. That’s because for us, days have been lengthening, with the Sun slightly higher in the sky each day, from December until now. After March 20, days continue to lengthen, making day longer than night. In the Southern Hemisphere, their long summer days have been shortening until now, with the Sun lower in the sky each day. After March 20, they continue to shorten, making day shorter than night. For them, then, this is the autumnal equinox.

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!

(Click here for the HMNS Planetarium Schedule)

Seeing Stars with James Wooten: March 2013

Jupiter is almost overhead at dusk, but now a little toward the west. Face high in the west at dusk and look for the brightest thing there (unless the Moon is also there), as Jupiter outshines all stars we ever see at night.

Saturn remains in the morning sky this month.  Look for it in the south/southwest at dawn.

Venus and Mars are on the far side of the Sun and out of sight this month. Venus passes behind the Sun (at superior conjunction) on March 28.

Sky Map: March 2013

Brilliant winter stars shift toward the southwest during March. Dazzling Orion is almost due south at dusk. His three-starred belt is halfway between reddish Betelgeuse and bluish Rigel. Orion’s belt points up to Aldebaran in Taurus the Bull. This winter and spring the Bull also contains Jupiter.

To Orion’s upper left are the twin stars Castor and Pollux, marking the heads of Gemini, the Twins. You can find Sirius, the brightest star we ever see at night, by drawing a line from Orion’s belt towards the horizon. To Orion’s left, about level with Betelgeuse, is Procyon, the Little Dog Star.

From Sirius, look a little bit to the right and then straight down to the horizon. If your southern horizon is clear of clouds and tall earthly obstacles, you’ll see Canopus, the second-brightest star ever visible at night. This star is so far south that most Americans never see it and many star maps made in the USA omit it. (You must be south of 37 degrees north — the latitude of the USA’s Four Corners — for Canopus to rise). As you view Canopus, keep in mind that the sky we see depends on our latitude as well as on time of year and time of night.

Joining the winter stars are stars of spring rising in the east.  Look for Leo, the Lion at dusk. Later in the evening, extend the Big Dipper’s handle to ‘Arc to Arcturus’ and then ‘speed on to Spica’; these stars rise at about 10 p.m. in early March but by 9 p.m. on the 31st.

March 2013 evening skies feature an extra special object — comet Pan-STARRS, our first naked-eye comet since Hale-Bopp back in 1997!  Observers south of the equator have already been observing Pan-STARRS, but the comet has been invisible to us because it has been south of the Sun in our sky. That is beginning to change as Pan-STARRS nears its closest approach to the Sun late on March 9.

Like all comets, Pan-STARRS will be at its brightest as it comes closest to the Sun.  At the same time, Pan-STARRS will be coming up through the plane where the planets orbit and thus will be much easier for us to see in mid-March. You can start looking in western twilight as early as March 7 if you have a low, unobstructed horizon. The comet may be slightly easier to see on March 12 and 13, when the crescent Moon is nearby. Once Pan-STARRS appears in the western dusk sky, it shifts towards the north (to the right as you face west) each night, until it fades and returns to the Sun’s glare in April.

As always, scientists are unsure how bright Pan-STARRS will get.  It now seems that it won’t be as spectacular as was Hale-Bopp in 1997. However, southern observers are seeing it naked-eye, and so should we. The comet could be about as bright as average stars such as those in the Big Dipper, but may be dim enough that you need a dark site to see it, especially once the Moon gets bigger.

Ultimately, though, we’ll have to wait and see. Sky and Telescope has a helpful finder chart here.

Moon Phases in March 2013:
Last Quarter                  March 4, 3:54 pm
New                               March 11, 2:53 pm
1st Quarter                    March 19, 12:26 pm
Full                                March 27, 4:29 am

At 6:01 a.m. on Wednesday, March 20, the Sun is directly overhead at the equator.  This therefore is the vernal (spring) equinox, a day when everyone on Earth has the same amount of daylight. After this date, our gradually lengthening days become longer than our nights, and we go into springtime. South of the equator, days have been shortening.  For them, this equinox marks the point when night becomes longer than day, and the onset of autumn.

Sunday, March 10, is the second Sunday of this month. Therefore, Daylight Saving Time begins at 2 a.m. this morning (the time officially goes from 1:59 to 3 a.m.)  Don’t forget to spring forward by advancing all clocks one hour on Saturday night, March 9!

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. This Spring Break, the George will be open to the public on Tuesday night, March 12, and Thursday night, March 14.

To enjoy the stars in any weather from the comfort of the HMNS Planetarium, click here for a full schedule.

Go Stargazing! March Edition

Saturn is up all night long by month’s end.  On Mar. 21, Earth passes between the sun and Saturn.  This alignment is called opposition because it puts Saturn and the sun on opposite sides of the Earth.  As a result, Saturn rises at dusk and sets at dawn on this date.  Look for Saturn to rise due east around 8:00 p.m. tonight. It will rise just a little bit earlier each night.

Venus enters the evening sky by the end of March.  As March opens, Venus is still setting during twilight, making it hard to notice at dusk.  By the end of the month, though, Venus has come out from behind the sun far enough for us to notice it clearly.  Face west at dusk and look for a point of light that outshines everything in the sky but the sun and the moon.

Mars has become an evening object.  It is now already up in the east-northeast by dusk.  On Jan. 29, Mars came to opposition as Earth passed between Mars and the sun, putting Mars in our sky all night long.  Earth is now pulling ahead of Mars on its faster orbit.  As a result, Mars is slightly dimmer each night for the rest of 2010.  However, during March, Mars remains brighter than average, and thus remains easy to see.  Look high in the southeast as dusk (due south by the end of the month) for a reddish point of light sort of in line with the two Dog Stars 

Jupiter is mostly out of sight this month.  Viewers with a very clear east-southeast horizon may notice Jupiter low in the sky at dawn by the end of March.  

STEAL ME FOR YOUR DESKTOP!! (The Bokeh Galaxy)
Creative Commons License photo credit: kevindooley

Dazzling Orion is high in the south.  His belt points up to Aldebaran, the eye of Taurus, the Bull.  The Dog Stars Sirius and Procyon are to Orion’s left.  Sirius is the brightest star we ever see at night.  Gemini, the Twins, are to Orion’s upper left.  Look for two stars of equal brightness less than 5 degrees (three fingers at arms’ length) apart.  These are Castor and Pollux, marking the twins’ heads.  High in the northwest is Capella, the sixth brightest star ever seen at night.  At dusk on March evenings, look below Sirius and a bit to its right for Canopus, the second brightest star we ever see at night. This star is in the keel (bottom) of the legendary ship Argo.  Canopus is so far south that most Americans never get to see it.  We, however, are far enough to the south that it barely rises for us, remaining low on the southern horizon.  

Meanwhile, spring stars are rising in the east.  A distinct backwards question mark shape outlines the mane and forepaws of Leo, the Lion.  Three stars forming a right triangle rise underneath; they mark Leo’s hindquarters.  The Big Dipper is once again fully risen at dusk. Later in the evening, you can extend its handle to ‘arc to Arcturus’ and then ‘speed on to Spica’.  These stars will be along the eastern horizon by 9:30 tonight, and even earlier later in the month.

Transit Lune/Saturne du 22 mai 2007
Creative Commons License photo credit:
ComputerHotline

Moon Phases in March 2010:

Last Quarter                  March 7, 9:43 p.m.

New Moon                      March 15, 4:02 p.m.

First Quarter                  March 23, 5:59 a.m. 

Full Moon                        March 29, 9:25 p.m.

At 12:33 p.m. on Saturday, Mar. 20, the sun is directly overhead at the equator.  This, then, is the vernal equinox. On this date, everyone in the world has the same amount of daylight and the same amount of night.  After this date, daytime is longer than night in the Northern Hemisphere, while night is longer than daytime in the Southern Hemisphere. 

Sunday, Mar. 14, is the second Sunday in March.  Accordingly, we spring forward into Daylight Saving Time at 2 a.m. that morning (1:59:59 a.m. is followed by 3:00:00 a.m.).  Don’t forget to set your clocks forward by one hour before going to bed Saturday night!

Go Stargazing! April Edition

night-sky-2
 Creative Commons LicensePhoto Credit: myyorgda

Saturn was up all night last month, and will remain well placed in the evening sky this month.  You can spot it in the east at dusk.  Mercury is briefly visible at dusk in late April.  Mercury is nowhere near as dazzling as Venus, but is bright enough to appear in twilight while most stars aren’t.  Look low in the west northwest at dusk, right over the point of sunset, beginning mid-month.  Mercury appears farthest from the Sun on April 26; the crescent moon that night will help you find it. 

Jupiter, in the southeast at dawn, is the brightest thing in that part of the sky (Venus is brighter but is located due east) unless the Moon is nearby (as it is on April 19).  Mars remains close to the horizon at dawn much of the spring, and takes longer to fully emerge into the morning sky.  Venus can help you find Mars towards the end of the month.  Beginning about mid-month, Mars appears to the lower left of the much brighter Venus.  Mars appears under Venus (between Venus and the horizon) on April 27.

Venus enters the morning sky in dramatic fashion this month.  Look due east right as day begins to break for the brightest thing there except for the Moon.  You’ll see Venus noticeably higher in the sky each passing day.   On the morning of April 22, the crescent Moon is very close to Venus.  In fact, the Moon actually occults (blocks) Venus shortly after sunrise that morning.  Venus remains the ‘morning star’ for the rest of 2009.  

Dazzling Orion shifts westward now that spring is underway.  His belt now points up right Aldebaran, the eye of Taurus, the Bull, which sets with Orion in the west.  The Dog Stars Sirius and Procyon are also found in the west, to Orion’s left.  Sirius is the brightest star we ever see at night.  Now above Orion are two stars of similar brightness less than five degrees apart.  These are Castor and Pollux, marking the heads of Gemini, the Twins. 

full-moon
 Creative Commons LicensePhoto Credit: myyorgda

Look in the east at dusk for stars in the shape of a backwards question mark, with a right triangle below that.  These stars are in the constellation Leo the Lion.  Saturn rises in Leo.  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 one in the sky once Sirius sets. 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.

Moon Phases in April 2009:

First Quarter                     April 2, 9:33 am
Full Moon                          April 9, 9:55 am
Last Quarter                     April 17, 8:38 pm
New Moon                         April 24, 10:23 pm

Easter is the first Sunday after the Paschal Full Moon, which is the first moon whose 14th day is on or after March 21 (the  “vernal equinox“).