Seeing Stars with James Wooten: The Stars of Spring are Rising

March star report
Mars remains in the west at dusk this month as it moves through Pisces. Mars continues to fade a little each night as Earth continues to leave it farther behind. After this month, Mars begins to be lost in the glare of the Sun.

Venus is in the west at dusk. Venus overtook Mars on February 21; now watch Venus leave behind the much dimmer Mars throughout March.

Jupiter was up all night long in February; now it is high in the east as soon as night falls. Jupiter outshines all stars we ever see at night, so it will be obvious in the east at dusk.

Saturn is in the south at dawn.

Brilliant winter stars shift towards 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. 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 10:00 in early March but by 9pm on the 31st.

full-moon-21

Moon Phases in March 2015:

Full March 5, 12:05 pm
Last Quarter March 13, 12:48 pm
New March 20, 4:38 am
1st Quarter March 27, 2:43 am

Sunday, March 8, is the second Sunday of the month. Accordingly, Daylight Saving Time begins at 2:00 am on that date. (Officially, the time goes from 1:59 to 3:00 am). Don’t forget to spring forward!

At 5:45 pm on Friday, March 20, the Moon is directly overhead at the equator. This is therefore the vernal equinox. On this date everyone on Earth has the same amount of daylight and the same amount of night. The common statement that day equals night on this date would be true if the Sun were a point in our sky. Since the Sun is a disk about half a degree across in our sky, day is slightly longer than night on the equinox. For us, this is the ‘official’ start of spring; our days will continue to lengthen until the longest days of June usher in summertime. Below the equator, it is autumn, and days will continue to shorten until winter begins in June.

The New Moon of March 20 blocks the Sun, casting its shadow on the Earth. This results in a solar eclipse. Unfortunately, the shadow traces a path in the North Atlantic between Iceland and Scandinavia, making the eclipse inaccessible to us.

Click here for the full 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.

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!

Seeing Stars with James Wooten: Changing stars remind us that summer’s coming

 This star map shows the Houston sky at 10 pm CDT on May 1, 9 pm CDT on May 15, and dusk on May 31.  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 almost overhead at dusk. From the Big Dipper’s handle, arc to Arcturus and then speed on to Spica in the southeast.  Saturn is below Spica in Libra.  Vega and Antares peek above the horizon, announcing the approaching summer.


This star map shows the Houston sky at 10 p.m. CDT on May 1, 9 p.m. CDT on May 15, and dusk on May 31. 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 almost overhead at dusk. From the Big Dipper’s handle, arc to Arcturus and then speed on to Spica in the southeast. Saturn is below Spica in Libra. Vega and Antares peek above the horizon, announcing the approaching summer.

Jupiter remains well placed for evening observing all spring. Look for it in the west at dusk, outshining all the stars we ever see at night. 

Mercury appears in the evening sky this month. Too close to the Sun to observe on May 1, Mercury gradually comes from behind the Sun and by mid-month, it appears low on the western horizon at dusk right above the point of sunset. Greatest elongation (apparent distance from Mercury to the Sun) is on May 25.

Mars is in the southeast at dusk this month. On April 8, Earth passed between the Sun and Mars. Mars has dimmed a little since then as Earth has begun to leave it behind. Still, Mars rivals the brightest stars we see at night.

Saturn is up all night long this month. On May 10, Earth passes between the Sun and Saturn, putting Saturn at opposition. That night, Saturn rises at sundown and sets at sunrise. Thus, Saturn is very low in the southeast at dusk, and very low in the southwest at sunup.

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.

A swath of brilliant winter stars sets in the west at dusk. Orion, the Hunter, is still visible in the west as May begins. His two dogs, represented by Sirius and Procyon, are to his left.  Gemini, the Twins, are above Orion. The Big Dipper is above the North Star, with its handle pointing to the right. From that handle, you can ‘arc to Arcturus’ and then ‘speed on to Spica’; those stars are in the east and southeast at dusk. Leo, the Lion, passes almost overhead in late evening.

As Orion and Taurus set, look for Antares, brightest star of Scorpius, the Scorpion, to rise in the southeast. At the same time, Vega, brightest star of the Summer Triangle, appears low in the northeast.  These stars remind us that summer is on the way. 

Moon Phases in May 2014:

1st Quarter: May 6, 10:16 pm 
Full May: 14, 2:18 pm
Last Quarter:  May 21, 7:59 am
New May: 28, 1:42 pm 

Click here to see 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!