A sky group this evening

The slender Moon, 3 days and 19 hours old, approaches red Mars and red Aldebaran.

During the following night and morning, the Moon will cross the Hyades, passing closest south of Mars at 10 Universal Time (5 AM in eastern North America) and closer north of Aldebaran 6 hours later.

The bull Taurus has a triangular face composed of the Hyades cluster, of which Aldebaran, the glaring eye, appears to be a member but is not.  The Hyades, in which there are several hundred fainter stars that we do not show, is the nearest cluster, being about 150 light years from us, but Aldebaran floats in front of it, at only 65 light years.

The Pleiades cluster appears more compact because it is about 450 light years away.  Such clusters could be called star tribes, because they consist of stars of the same age, born from an interstellar cloud.  Both of them lie outward from us in our spiral arm of the Milky Way galaxy.

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DIAGRAMS in these posts are made with precision but have to be inserted in another format.  You may be able to enlarge them on your monitor.  One way: right-click, and choose “View image”, then enlarge.  Or choose “Copy image”, then put it on your desktop, then open it.  On an iPad or phone, use the finger gesture that enlarges (spreading with two fingers, or tapping and dragging with three fingers).  I am grateful to know of what methods work for you.

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