February Moon at Descending Node


   Wednesday February 14th the thin waning crescent Moon will be crossing 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 day of the node crossing the 28-day old waning crescent Moon will be over the eastern horizon about an hour before the Sun rises. The Moon will reach new phase approximately 24 hours after this node crossing.
   
   
   
      

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.

Mars Meets Antares

   Monday morning February 12th the ‘Red Planet’ Mars will be within about 5o from the reddish star Antares, the heart of Scorpius the Scorpion. Both Mars and Antares currently have the same apparent magnitude of 1.03.
   Antares owes its name to its near matching color of the reddish colored planet Mars. I have often described the name Antares origin as meaning ‘anti mars’, to distinguish the star from the planet. Sort of like saying at times like now when they are close that ‘that reddish object is not Mars’. However the name Antares from the Greek really means ‘equal to Mars’

   This part of the sky, the summer sky for the northern hemisphere, has probably the best view of the Milky Way despite it being early morning. So it is with a great deal of excitement that as Mars approaches Antares and soon Saturn Mars is moving closer to the Milky Way.

   
   
   

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.

February Moon at Apogee

   Our Moon reaches apogee, (greatest distance from Earth), on Sunday February 11th. At that time the Moon will more or less be at a distance of 31.80 Earth diameters (405,700 km or 252,090 miles) from the Earth.

   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*

   On the day of the apogee the 25.6-day old very thin waning crescent Moon will be over the eastern horizon at around sunrise local time and within about 2o from the ringed planet Saturn.

   Since the Moon and Saturn are in the area of the Milky Way this should make for interesting viewing with Binoculars and pictures,

*Click here to read my 2006 Scope on the Sky column “The Real Shape of the Moon’s Orbit”. (PDF)

Read this very informative article about the Earth-Moon system and their orbital motions, written by Joe Hanson. “Do We Orbit the Moon?”

   
   
   

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.

Jupiter at Western Quadrature

   Saturday February 10th the ringed giant gas planet Jupiter reaches the point along its orbit around the Sun where Jupiter would be described as being at western quadrature. It is at a 90o angle relative to the Earth and the Sun.
   Where is Jupiter currently? Jupiter rises after midnight local time and is located within the stars of Libra the Scales. Down to the left from Jupiter, or further east, are the planets Mars and Saturn. The waning crescent Moon is making its way eastward through this area as well.

   
   
   

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.nd as this graphic shows has the last quarter Moon nearby on the 14th.

January Waning Crescent Moon at Most Distant Apogee, and in Conjunction with Mercury and Saturn

   Our Moon reaches apogee, (greatest distance from Earth), on Monday January 15th. At that time the waning crescent Moon will more or less be at a distance of 31.86 Earth diameters (406,464 km or 252,587 miles) from the Earth. This is the greatest distance between the Earth and our Moon for this year. The next most distant apogee occurs during July when the full Moon will be at an apogee distance of 31.84 Earth diameters (406,223 km or 252,415 miles).

   On the day of the apogee the 28-day old and very thin waning crescent Moon rises between Mercury and Saturn. However only about 2% of the Moon’s disk will be showing and moonrise is only about one-half hour before sunrise so the Moon may be a challenge to see.

   Does our Moon actually go around the Earth as the 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)

Read this very informative article about the Earth-Moon system and their orbital motions, written by Joe Hanson. “Do We Orbit the Moon?”

   
   
   

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.

Moon-Jupiter Conjunction


   Thursday morning December 14th, before the Sun rises, the thin 26-day old waning crescent Moon is a few degrees from the giant planet Jupiter. The ‘red planet’ Mars is a few degrees west (above) Jupiter as they rise in the east.

   
   
   
   
   

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.

November Moon at Apogee

   Our Moon reaches apogee, (greatest distance from Earth), on Tuesday November 21st. At that time the Moon will more or less be at a distance of 31.84 Earth diameters (406,132 km or 252,359 miles) from the Earth.

   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*

   On the day of the apogee the 3.5-day old waxing crescent Moon will be over the southwestern horizon at sunset local time. Were it not so bright the glow of the Milky Way in the background might have been visible. Saturn is visible, but it is low above the horizon.

*Click here to read my 2006 Scope on the Sky column “The Real Shape of the Moon’s Orbit”. (PDF)

Read this very informative article about the Earth-Moon system and their orbital motions, written by Joe Hanson. “Do We Orbit the Moon?”

   
   
   

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.