Waxing Crescent Moon Passes Jupiter and Saturn

   Wednesday and Thursday evenings November 18th and 19th at sunset local time look westward for our Moon and two planets. The 4-day old waxing crescent Moon will be about 6o to the west, right from Jupiter and about 9o from Saturn.

   During the 24-hours between the two evenings our Moon will have aged 1 day and will have moved approximately 15o toward the east. And by Friday the Moon will be about 5o to the east, left from Saturn and about 7o from Jupiter.

   
   
   

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November Moon at Descending Node


   Tuesday November 17th the nearly 3-day old waxing crescent Moon crosses the plane of the ecliptic moving south. This is known as the descending node, one of two intersections the Moon’s orbital path (dark green line) has with the ecliptic.


   On the date of the descending node the waxing crescent Moon will be over the southwestern horizon at sunset local time. Spread across the horizon from west to east are Jupiter, Saturn, Dwarf Planet Ceres, Neptune, and Mars.

   
   
   
   
   

Click here to go to the Qué tal in the Current Skies web site for monthly observing information, or here to return to bobs-spaces.


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October Moon at Descending Node

   Tuesday October 20th the 4-day old waxing crescent Moon crosses the plane of the ecliptic moving south. This is known as the descending node, one of two intersections the Moon’s orbital path (dark green line) has with the ecliptic.

   On the date of the descending node the waxing crescent Moon will be over the southwestern horizon at sunset local time. Spread across the horizon from west to east are Jupiter, Saturn, Dwarf Planet Ceres, Neptune, and Mars.

   
   
   
   
   

Click here to go to the Qué tal in the Current Skies web site for monthly observing information, or here to return to bobs-spaces.


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Mercury- Spica & Moon – Antares

   Tuesday September 22nd shortly after sunset local time look toward the western horizon for the innermost planet Mercury to be about 1o from the bluish-white star Spica in Virgo the Harvest Maiden. The two should make for an interesting comparison in apparent magnitudes with Spica at 0.96 and Mercury with a -0.01 apparent magnitude.
   The nearly first quarter but still waxing crescent Moon will be about 7-8o from the reddish star Antares in Scorpius the Scorpion. Both are positioned over the southern horizon.

   
   
   

Click here to go to the Qué tal in the Current Skies web site for monthly observing information, or here to return to bobs-spaces.


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the Moon and the Scorpion

   Tuesday evening August 25th watch for the 7-day old first quarter Moon to be about 5o from the reddish star Antares. This star, sometimes known as ‘the rival of Mars’ because the color of the planet and Antares are strikingly similar. This is most notable during the years when Mars passes by Antares and the two are together in the sky.
    From mythology Antares is the ‘heart’ of Scorpius the Scorpion. In reality Antares is a red supergiant star that is the 15th brightest night time star. As the brightest star in the constellation of Scorpius Antares is the alpha star or α Scorpii (alpha scorpii).
   Antares is so big in size that it dwarfs many other stars, yet there stars bigger than Antares!

   
   
   

Click here to go to the Qué tal in the Current Skies web site for monthly observing information, or here to return to bobs-spaces.


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Moon on the Move

   Over the course of the next week or so the Moon will be moving eastward across the evening skies as it waxes from crescent toward full Phase on September 1st. This series of graphics shows the sky at 9:00 pm CDT daily until August 30th. Use the graphics as a guide to locating some of the stars near the path the Moon follows, as well as the evenings when the Moon is in conjunction with Jupiter, then Saturn.


   
   
   

Click here to go to the Qué tal in the Current Skies web site for monthly observing information, or here to return to bobs-spaces.


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Virgo Grabs for a Croissant – or is it Crescent?

   Saturday August 22nd the 4-day old waxing crescent Moon will be about 4-5o from the bluish-white star Spica in the constellation Virgo the Harvest Maiden. Spica, from mythology, is described as the bundle of grasses (wheat, oats ?) in her hand – which is appropriate for something representing agriculture.
   Rising in the east is a pair of outer planets, Jupiter and Saturn.

   
   
   

Click here to go to the Qué tal in the Current Skies web site for monthly observing information, or here to return to bobs-spaces.


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August Moon at Perigee

   Our Moon reaches perigee, (closest to Earth), for this orbit, on Friday August 21st. At that time the Moon will be at a distance of 28.50 Earth diameters, 225,868 miles (363,500 km) from the Earth.

   On the day of the perigee Moon the 3-day old waxing crescent Moon will be over the western horizon setting about 3 hours after the Sun sets. Rising over the eastern horizon are two of the giant outer planets, Jupiter and Saturn.

   Does our Moon actually go around the Earth as this graphic shows? From our perspective on the Earth the Moon appears to circle around the Earth. However, in reality, the Moon orbits the Sun together with the Earth*
   *Click here to read my 2006 Scope on the Sky column “The Real Shape of the Moon’s Orbit”. (PDF)

   
   
   
   
   
   

Click here to go to the Qué tal in the Current Skies web site for monthly observing information, or here to go to bobs-spaces.


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July Moon at Perigee

   Our Moon reaches perigee, (closest to Earth), for this orbit, on Friday July 24th. At that time the Moon will be at a distance of 28.87 Earth diameters, 228,913 miles (368,400 km) from the Earth.

   On the day of the perigee Moon the 4-day old waxing crescent Moon will be over the southwestern horizon after sunset. Off to the east and just rising are the planets Jupiter and Saturn. However look toward the northwest to see Comet 2020 F3 (NEOWISE) below the stars of the Big Dipper.

   Does our Moon actually go around the Earth as this graphic shows? From our perspective on the Earth the Moon appears to circle around the Earth. However, in reality, the Moon orbits the Sun together with the Earth*
   *Click here to read my 2006 Scope on the Sky column “The Real Shape of the Moon’s Orbit”. (PDF)

   
   
   
   
   
   

Click here to go to the Qué tal in the Current Skies web site for monthly observing information, or here to go to bobs-spaces.


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Comet on the Run!

   Comet 2020 F3 (NEOWISE) has moved to the evening skies after its close approach to the Sun earlier this month. The comet is now outbound from the solar system and will pass by the Earth coming the closest on the 22nd – 23rd. Over the next month or so the comet will gradually move into the polar circumpolar region of the sky and will be above the horizon all night.

   On the evening of the comet’s closest approach to the Earth it will be somewhat lined up with the ‘Pointer Stars’ in the Big Dipper. However instead of going toward the North star, Polaris, go in the opposite direction to find the comet.

   Click here to go to the Sky Live web site for accurate finder charts for this comet and other comets.

   Watch this short video to follow the comet’s path:

   
   

Click here to go to the Qué tal in the Current Skies web site for monthly observing information, or here to return to bobs-spaces.


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