September Perigee Moon

   Our Moon reaches perigee, (closest distance to Earth), for this orbit on Saturday September 8th. At that time the Moon will be at a distance of 28.325 Earth diameters (361,355 km or 224,535 miles) from the Earth.

   Saturday morning September 8th the very thin 28-day old waning crescent Moon will be about 1.5o from the star Regulus and about 2-3o from the innermost planet Mercury.

   *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.


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September Moon at Ascending Node

   Thursday September 6th the waning crescent Moon will be crossing the plane of the ecliptic moving north relative to the ecliptic. This is known as the ascending node, one of two intersections the Moon’s orbital path has with the ecliptic. The ecliptic is actually the Earth’s orbit and the Moon’s orbit is inclined about 6o from the ecliptic. So there are two node intersections, the ascending and descending nodes.

On the day of the node crossing the 26-day old thin waning crescent Moon will be about 13o east (left) from the star Procyon in the constellation Canis Minor.

   Does our Moon actually go around the Earth as many graphics show? 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 return to bobs-spaces.


Also Follow me and other great resources at Feedspot.

Mercury Passes the Heart of the Lion


   Early mornings this week, before the local time of sunrise, look toward the east for the innermost planet Mercury as it moves east passing within about 1-2o from the star Regulus. This animated graphic shows the morning skies on September 5th to the 7th at 5:15 am CDT

   
   
   
   Regulus marks the bottom of the backward question shape for Leo the Lion, and Regulus also represents the heart of Leo.

   
   
   

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.


Also Follow me and other great resources at Feedspot.

August Perigee Moon at Ascending Node, and a Partial Solar Eclipse

   Friday August 10th the 28.5 day old waning crescent Moon will be crossing the plane of the ecliptic moving north relative to the ecliptic. This is known as the ascending node, one of two intersections the Moon’s orbital path has with the ecliptic. The ecliptic is actually the Earth’s orbit and the Moon’s orbit is inclined about 6o from the ecliptic. So there are two node intersections, the ascending and descending nodes.

   Does our Moon actually go around the Earth as many graphics show? 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?”

Perigee Moon
   Our Moon reaches perigee, (closest distance to Earth), for this orbit on Friday August 10th. At that time the Moon will be at a distance of 28.07 Earth diameters (358,100 km or 222,513 miles) from the Earth. The Moon will also be 28.5 days old, and only 15.8 hours from new Moon Phase.
    When the time of perigee is close to a node crossing there will be either a lunar or solar eclipse. In this case less then 24 hours after the node crossing there will be a partial solar eclipse. This solar eclipse is only visible from Arctic, Greenland and parts of Asia.

   
   
   

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.


Also Follow me and other great resources at Feedspot.

Taurus Noses the Moon

   Monday morning August 6th the 24-day old waning crescent Moon will be about 4o from the reddish star Aldebaran, part of the open star cluster the Hyades. This v-shaped cluster of stars marks the face of Taurus the Bull, and Aldebaran represents the red ‘angry’ eye of Taurus.

   
   
   

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.


Also Follow me and other great resources at Feedspot.

Waning Crescent Moon in Close Conjunction with Aldebaran

   Tuesday July 10th in the hour or so before sunrise local time the very thin 26.5-day old waning crescent Moon will be within about 1o (width of 2 full Moons) from the reddish star Aldebaran in the open star cluster the Hyades. The Hyades are a v-shaped group of stars marking the face of Taurus the Bull. Reddish-colored Aldebaran represents an angry eye of the Bull.
   This conjunction is close enough so that a combination of a thin waning crescent Moon and the bright Aldebaran should make for a take a look with binoculars or the ‘naked-eye’.

   For those keeping track of Jupiter should be relieved to read that Jupiter’s retrograde motion has ended, and at least for the foreseeable future Jupiter has agreed to stick with the ‘program’ and resume it’s direct motion – eastward.

   
   
   

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.


Also Follow me and other great resources at Feedspot.

Moon in Conjunction with Mercury and Uranus

   Sunday morning May 13th the 27-day old thin waning crescent Moon and the planets Mercury and Uranus will be in a grouping that will fit within a binocular field of view. All three rise about 1 hour before sunrise.
   This may also be an opportunity to see a crescent Moon that is within about 1 1/2 days from its new Moon phase.

   
   
   

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.