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Planetary Treats and Celestial Delights During Scorpio
For the Northern Hemisphere
October 23
- November 22, 2010

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All times are local unless otherwise specified.

Look Up!

Planetary Treats
Will You See Mars and Mercury?
The "New" Venus Switches Horizons
Saturn Returns to View, then Prominence
Is Jupiter's Missing Stripe Returning?
Celestial Delights
A Witch Appears in the Heavens!
Watery Constellations ~ A Celestial Sea
A Square Replaces a Triangle
Plus ...
Sky Lights
Sky Calendars
Moon Dances 10/7-11/5
Moon Dances 11/5-12/5
Scorpio Navigation Page
The Night Sky ~ Home Page

Planetary Treats


Will You See Mars and Mercury?
Mars
Mercury

Image: Hubble Heritage Project

Image Description

Image: NASA / JHUAPL / ASU / CIW

Image Description

Mars and Mercury are difficult to see in the twilight night sky. They hug the southwestern horizon, so you'll need right timing, clear skies, a flat, unobstructed view, aided vision, experience and good luck!!! Mars sets about an hour after the Sun, at 7:30pm Daylight Time in the beginning of Scorpio and at 6:00pm Standard Time by its end. Mercury sets less than an hour after the Sun during Scorpio.

Mark Your Calendar

Bring along binoculars for your sunset observations, the stronger the better!

November 7, Sunday, the whisker thin young Moon, Mars and Antares are in close proximity, while Mercury hugs the horizon. You just may see young Luna who can guide you to Mars and Antares, however it may be impossible to see the star and planets. Click 11/7 Dusk Map/Text to learn more. Also see this 11/7-8 twilight map.

Reflections ~ Mars, Mercury, Scorpius
Mars and Mercury transit the cosmic Scorpion November 7-21.

November 20, Monday, presents another opportunity and challenge. Mars and Mercury are at their closest in the deepening twilight, making this an outstanding time to spot the planetary pair. Mercury is 5x brighter than Mars. 11/20 Map  

December 1, Wednesday, Mercury is at greatest elongation, east of the Sun (21).

 

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The "New" Venus Switches Horizons
Venus Has Phases Like the Moon

Image: Watch The Stars.co.uk

 

You can see the phases of Venus in the image above. The planet moves from her Full phase (image top) to her waning Gibbous and waning Crescent phase in the evening sky (image left). As the planet switches from the evening to the morning sky, it is positioned between the Earth and Sun in what is called inferior conjunction, hidden from our view by the bright light of the Sun (image bottom). This marks Venus in her New Phase, similar to a New Moon. Venus is in inferior conjunction October 28.

A few weeks before and after inferior conjunction, Venus appears to move backwards among the stars, to the west instead of to the east. This westerly motion is called a retrograde. Venus is retrograde October 8 - November 11. During the retrograde Venus is at a close approach to Earth and briefly beams her striking, bright light very close to the horizon, piercing the twilight glow in the evening and then the morning sky.

Venus moves from her New phase (image bottom) to her waxing Crescent and waxing Gibbous phase in the morning sky (image right). Note: In the evening sky (image left) Venus gets bigger in disk size and her illuminated phase decreases; in the morning sky (image right) the opposite occurs. You can also see this demonstrated in APOD's animation of the phases of Venus. During Scorpio, morning Venus waxes to a 15% illuminated Crescent.

Image the Phase & Apparent Disk Size of Venus

Venus 2010 Evening Animation

Montage: Venus Phases
Shows Venus approaching inferior conjunction in 2004.

 

Venus, at the end of October, is hidden from our view by the light of our central luminary. Begin looking for the reappearance of her gorgeous light, often mistaken for a UFO, in the morning sky as early as November 7. Look to the east-southeastern horizon around 5:45am; Spica and Saturn lie above. Mid-November Map

Venus lies 6° below Spica November 7. It might appear that Venus' rapid climb in the morning sky will allow it to catch Spica, but it never quite gets there. The closest the two come is 4° during November's third week. Astronomy Magazine 11/10

Orbital Motion

As the image above shows, the orbital motion of Venus creates a difference in apparent disk size and phase illumination. This results in a unique and surprising greater or lesser brilliance. Venus, less illuminated by the Sun, appears more brilliant!

When Venus is far from Earth, it lies on the far side of the Sun (image top) and we telescopically see Venus fully illuminated by the Sun. A "Full Venus" is like a Full Moon. Venus moves from a Full phase toward a thin Crescent phase, as it nears Earth and inferior conjunction (image bottom). A thin Crescent Venus closer to Earth looks bigger and, therefore, brighter than a small "Full" Venus farther away from Earth.

Hmmm ... Evening Venus (image left) was at greatest brilliancy, magnitude -4.8, September 23, when it was a 26% waning Crescent. Morning Venus (image right) achieves greatest brilliancy December 4 at magnitude -4.9, when it is a 26% waxing Crescent.

Reflections ~ Venus Retrograde

Venus' retrograde cycle [10/8-11/17] ... August through November, our attention is brought towards evaluating our relationships. Relationships with everyone (spouse, lover, friend, co-worker, boss, government) and everything (money, food, sexuality, possessions, emotional attachments, endless list here). Strategic engagement, negotiations, love and grace. Passion, life force, regeneration and healing. Deeper connection. Transformation. Jacqueline Lasahn / AstroFlash! 9/28/10

This retrograde cycle is integral to a larger 9 month cycle that encompasses 3 exact conjunctions of Venus and Mars: August 20/21 + October 3, 2010 and May 22, 2011.

Creative Potential. We are in a nine month passage that spans three conjunctions of Venus and Mars. ... Although Venus and Mars conjunct about every two years, this cycle of three conjunctions occurs about every 6 1/2 years. A potential for personal metamorphosis in establishing a more intimate and authentic relationship between your core self and the ingrained patterns of behavior of your conscious ego. Jacqueline Lasahn / AstroFlash! 9/28/10

 

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Saturn Returns to View in Late October

Saturn Returns to Proiminence Mid-November
Venus Blazes Below

Images: Roen Kelly / Astronomy Magazine

Saturn returns to view before dawn late October. Look for the ringed planet low in the eastern sky. Saturn shines brightly .... Don't confuse it with Arcturus, a brighter star that appears near the same altitude as Saturn but significantly farther to the north. Astronomy Magazine 10/10

Saturn returns to prominence in the morning sky ... With each passing day, the ringed planet rises earlier and climbs higher before dawn paints the sky. By Novermber's end, it's 30° high when twilight commences. ... Despite Saturn's allure, Venus quickly competes for your morning attention. Astronomy Magazine 11/10

 

Saturn rises in the in the morning sky accompanied by brighter golden Arcturus to the north. Review maps above. At the end of October, an hour before sunrise, look low in the east to find the pair. November 3-4 use the waning Crescent Moon to locate Saturn. 11/3-4 Dawn Map As the days unfold, both Saturn and Arcturus climb higher before dawn. By mid-November the ringed planet is almost 1/3 of the way to the zenith. Saturn rises in the beginning of Scorpio at 5:30am Daylight Time and at 3:15am Standard Time by its end.

As seen in the map above, Spica and Venus lie below the ringed planet in mid-November. Saturn at magnitude 0.9 shines a little brighter than Spica at magnitude 1.0. Venus blazes at magnitude -4.4, so bright it may be mistaken for a UFO! Note: Venus rises up to Spica during Scorpio; the closest they get is 4 degrees during the third week of November.

Saturn's telescopic rings are tilting open, revealing more and more of their northern face. The planet's ring tilt is 9 in November. Saturn's Rings 11/15 Generate images of Saturn's ring tilt as seen from Earth with the Solar System Simulator.

 

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Hubble Sees Giant Jupiter Minus One Stripe
Is the Planet's Missing Stripe Returning?

Image: NASA / ESA / M.H. Wong (UC Berkeley) /
A.A. Simon-Miller (Goddard Space Flight Center) /
H.B. Hammel (SSI) / Jupiter Impact Science Team

 

Note: Earth's size is seen in the lower left of the image. Eleven Earths can fit across Jupiter's diameter! Have fun checking out the Interactive Planet Size Comparison. Choose miles or kilometers for the unit of measurement.

11/11/10 Update: Jupiter's missing stripe may be returning! Experienced planetary photographers are encouraged to monitor Jupiter for further developments. Stay tuned to spaceweather.com for the latest updates.

Hubble observations of our giant gaseous planet June 7, 2010 gave scientists a close-up look at changes in Jupiter's atmosphere following the disappearance of the dark Southern Equatorial Belt (SEB) in May 2010. Hubble's Before and After Photos

In the Hubble view [above], a slightly higher altitude layer of white ammonia ice crystal clouds appears to obscure the deeper, darker belt clouds. "Weather forecast for Jupiter's South Equatorial Belt: cloudy with a chance of ammonia," Hammel says.

The team predicts that these ammonia clouds should clear out in a few months, as it has done in the past. The clearing of the ammonia cloud layer should begin with a number of dark spots like that seen by Hubble along the boundary of the south tropical zone.

"The Hubble images tell us these spots are holes resulting from localized downdrafts taking place. We often see these types of holes when a change is about to occur," Simon-Miller says.

"The SEB last faded in the early 1970s. We haven't been able to study this at this level of detail before," Simon-Miller adds. "The changes of the last few years are adding to an extraordinary database on dramatic cloud changes on Jupiter." Hubble News Release 6/16/10

Amateur astronomers are reporting a surprising number of fireballs exploding in Jupiter’s atmosphere! See Fireballs Light Up Jupiter to learn more. The Hubble News Release 6/16/10 for the above image also explains why some Jupiter impacts do not leave a debris cloud.

 

Jupiter catches the eye as it travels high above the southern horizon during the evening and early morning hours. The brilliant planet is easily seen in the southeast about 30 minutes after sunset. By 8:00pm it shines at its highest in the south. Early birds and night owls can watch Jupiter sink in the west and set around 4:15am Daylight Time in the beginning of Scorpio and at 1:45am Standard Time by its end.

Jupiter, moving further from the Earth, dims during Scorpio from magnitude -2.8 to magnitude -2.6 and its disk size shrinks about 10%. Though diminishing in brightness and size the planet remains the brightest point of light in the night sky until it sets.

During Scorpio, Jupiter's retrograde motion (7/23-11/17) increases the giant planet's distance from nearby Uranus. Uranus retrograde (7/5-12/4) shines at magnitude 5.8; the normally telescopic planet is now bright enough to be seen with binoculars and without an optical aid in a dark sky. November 15/16, Monday/Tuesday night, Uranus, Jupiter and the waxing Gibbous Moon are in close proximity, in the Celestial Sea at the circlet of Pisces. 11/15 9pm Map Click Moon Dances for an 11/ 13-18 star map and meditative reflections. Learn more about the Celestial Sea below.

Telescopic Jupiter

Viewing Jupiter with a telescope promises to be an adventure. Any size telescope will reveal Jupiter's missing South Equatorial Belt or perhaps the "SEB Revival" ... the return of the missing stripe! In addition seeing nearby Uranus with a telescope or binoculars is a special 2-for-one planetary treat! Both planets, still relatively close to Earth, also lend themselves to better than normal observations.

The four Galilean Moons, the largest and brightest satellites of Jupiter can be seen in a dark country sky with binoculars. They appear starlike on either side of the planet. With a telescope you just might see one of these cast a shadow on the Jovian cloud tops or disappear into the planet's shadow and then reappear in full brightness.

Jupiter’s Moons
Sky & Telescope’s JavaScript utility helps
locate Jupiter’s four brightest satellites anytime
between January 1900–December 2100.
It also lists the satellite phenomena for the chosen day.

Jupiter ~ The Fun To Watch Planet

Jupiter Observing Guide

Transit Times of Jupiter's Great Red Spot

 

The Planets
Is it a planet? ... What planet? When you look up at the night sky, how do you know you are looking at a planet? Learn what a plutoid is. Click here.

 

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Celestial Delights


Witch Head Nebula!
Do you see the witch's face?

Image: Gary Stevens

Her chin is at lower right,
her lips are punctuated with a red star,
and her pointed nose is just above center.

This suggestively shaped reflection nebula is associated with the bright star Rigel in the constellation Orion. More formally known as IC 2118, the Witch Head Nebula glows primarily by light reflected from Rigel, which can be seen in A Witch by Starlight. This nebula which lies about 1000 light-years away is a huge cloud of interstellar dust particles that reflect the light of nearby stars. The particulate scattering of light is more efficient at the shorter (blue) wavelengths of visible light, so the camera records this image in ghostly blue ... Wait ... did I hear an evil laugh? ... Just kidding! <] ;-)

Reach for Heaven's Light, if you ever have a fright!

Note: "Because Halloween greeting cards often depict a witch riding a broom in front of a full Moon many people have the mistaken notion that there is a full Moon every year on Halloween when in fact we won't have a full Moon on Halloween again until 2020. In fact this year the Moon won't rise until almost three in the morning and it will be a waning crescent Moon." Star Gazer 2010 Script 10/18-24 Click Moon Dances for a map and meditative reflections on the Hallow Moon.

 

 

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The Watery Constellations ~ A Celestial Sea


Image: SPACE.com graphic/Made with Starry Night Software

*Printable Image*

The above map shows the Celestial Sea constellations as seen from mid-northern latitudes around 10:00pm Daylight Time in October and 9:00pm Standard time in November. Eridanus is mostly below the horizon. The constellations move up in the sky during the night, so most of Eridanus becomes visible low on the horizon by midnight.

 

Celestial Sea sailing requires both skill and experience, also the darker the sky the better for navigating among these faint constellations.

During the mid-to-late evening hours ... there are very few bright stars in the region that is spread across the southern skies.

This whole area can be called the "Watery" part of the sky. It isn't really watery, of course. It is watery in the sense that it is vague and dim, like a dark pool. These watery constellations — Capricornus, the Sea-Goat; Aquarius, the Water Bearer; Pisces, the Fishes; Piscis Austrinus, the Southern Fish; Cetus, the Whale [aka the Monster]; and finally Eridanus, the River -- may have commemorated a great flood of long ago. Full Article: Watery Part of the Sky by Joe Rao

In 2010 Jupiter is the brightest point of light residing in the Celestial Sea. Mira, a variable star in the constellation Cetus, changes in brightness during the year, making it visible or invisible to the unaided eye. Mira, reaching maximum visibility in early October, can now be viewed without an optical aid. Look for this variable star east (left) of Jupiter, when there is no moonlight interference. Use this printable map as a guide; it also shows the location of the Moon 11/13-18.

Note: Be sure to look for the shapeshifting Celestial Sea triangle November 13-18.

 

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Autumn's Square of Pegasus Replaces Summer's Great Triangle

Image: Starry Night Software / Adobe Photoshop

*Printable Image*

The stars overhead change as the seasons change on Earth. The stars highest above the horizon in mid-evening are considered to be the stars of the season. In the beginning of November go outside 8:00pm-9:00pm. The three brilliant stars of the Summer Triangle are beginning to slowly descend toward the horizon. Almost overhead are the four much dimmer stars, which make up the Great Square of Pegasus the winged horse, the Autumn Square.

 

The Autumn Dipper? A Flying Horse? Time Traveling?
Navigate with Pegasus and Cassiopeia. Locate Andromeda.

 

... suddenly we are drawn into new realms and
we become the night sky travelers!

 

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Sky Lights ~ Scorpio

Printable Sky Lights

October 23 - November 22

Mars and Mercury hug the southwestern horizon and are challenging to see in the twilit sky. You'll need right timing, clear skies, a flat horizon, aided vision and good luck!!! Mars sets about an hour after the Sun, at 7:30pm Daylight Time in the beginning of Scorpio and at 6:00pm Standard Time by its end. Mercury sets less than an hour after the Sun during Scorpio. 11/7 the youngest, thinnest Moon, Mars and Antares are in close proximity; will you see them? 11/7 Dusk Map/Text If you're up for another challenge, Mars and Mercury are at their closest 11/20 in the deepening twilight. Mercury is 5x brighter than Mars. 11/20 Map Bring along binoculars for these observations, the stronger the better!   

Jupiter is eye-catching and easily seen in the southeast about 30 minutes after sunset. The planet is at its highest in the south around 8:00pm. Jupiter sets in the west at 4:15am Daylight Time in the beginning of Scorpio and at 1:45am Standard Time by its end. Jupiter, moving further from the Earth, dims during Scorpio from magnitude -2.8 to magnitude -2.6. Its disk size shrinks about 10%. The planet remains the brightest point of light in the night sky until it sets. Jupiter's retrograde motion (7/23-11/17) increases its distance from nearby Uranus during Scorpio. Uranus at magnitude 5.8 can now be seen with binoculars and without an optical aid in a dark sky. 11/15 Uranus, Jupiter and the waxing Gibbous Moon are in close proximity. 11/15 9pm Map

Venus retrograde (10/8-11/17) is in inferior conjunction 10/28. A few weeks before and after this conjunction Venus is at a close approach to Earth and briefly beams its striking, bright light very close to the horizon, piercing the twilit glow. Inferior conjunction marks Venus' switch from the evening sky and the sunset horizon to the morning sky and the sunrise horizon. Begin looking for morning Venus 11/7, around 5:45am, in the east-southeast; Spica and Saturn lie above. Mid-November Map Evening Venus was at greatest brilliancy, magnitude -4.8, 9/23; morning Venus achieves greatest brilliancy 12/4 at magnitude -4.9. Venus has phases like the Moon. Before inferior conjunction, in the evening sky, Venus gets bigger in disk size and its illuminated phase decreases; afterwards the opposite occurs in the morning sky. You can see this demonstrated in APOD's animation of the phases of Venus. These phases and more can be seen in this 2010 Evening Animation of Venus. Also check out this montage, which shows Venus approaching inferior conjunction in 2004. During Scorpio, morning Venus waxes to a 15% illuminated Crescent.

Saturn appears in the morning sky, low in the east at the end of October. Look about an hour before sunrise. Brighter Arcturus lies to the north (left) of Saturn Late October Map 11/3-4 look for Saturn and the waning Crescent Moon. 11/3-4 Dawn Map As the days unfold, watch Saturn climb higher before dawn. By mid-November Saturn is almost 1/3 of the way to the zenith. Spica and Venus lie below the ringed planet at this time and Arcturus lies to the north. Mid-November Map The planet shines at magnitude 0.9, brighter than Spica at magnitude 1.0. Saturn rises at 5:30am Daylight Time in the beginning of Scorpio and at 3:15am Standard Time by its end. Saturn's telescopic rings are tilting open, revealing more and more of their northern face. The planet's ring tilt is 9 in November. Saturn's Rings 11/15 Generate images of Saturn's ring tilt as seen from Earth with the Solar System Simulator.


Vega is the brightest star in the northwest, setting in the beginning of Scorpio at 2:00am Daylight Time and by its end at 11:30pm Standard Time. It is the western point of the Summer Triangle, which is slowly sinking on the western horizon giving way to the autumn stars overhead. Altair is the triangle's southern point and Deneb the eastern point.

Fomalhaut is the brightest star low on the southwestern horizon, setting in the beginning of Scorpio at 2:00am Daylight Time and by its end at 11:30pm Standard Time (same as Vega). It is the Southern Royal Star and the brightest star in the constellation Pisces Austrinus below Aquarius. In 2010 brilliant Jupiter lies diagonally to the northeast of Fomalhaut Star Chart It is part of the celestial sea constellations.

Capella is the bright star in the northeast. Capella is the brightest star seen the most often.

The Great Square of Pegasus is a sure sign of autumn. Look for the four stars almost overhead as night begins. Stars of Autumn Also see Autumn Dipper? A Flying Horse?.

The Pleiades star cluster is another sign of autumn. Look east as the Sun sets for Taurus the Bull and its bright red Bull's eye, Aldebaran; then look a little west to find the mini dipper-shaped, sparkling Pleiades, the Bull's shoulder. Stars of Autumn

 


Sky Calendars

Monthly Sky Calendars +

Monthly Lunar Highlights

I'd like to know your thoughts about The Night Sky ...
send me an email
.
May your Night Sky traveling always be filled
with Celestial Delights and Treats!
Susan Sun

 

 

Getting Started in Astronomy
Includes a downloadable Moon map and bimonthly star charts.

At Skymaps.com download a current monthly guide, evening sky map & calendar.

Link to Sky and Telescope's This Week's Sky at a Glance.

Spaceweather.com keeps you looking up!

 

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