(Nandana) #1

east of the V and Ukert Crater to a shadow
feature nicknamed Aries’ Hoofprint. First
mentioned by name a decade ago in an
edition of Astronomy’s email newsletter,
Aries’ Hoofprint is formed from an intri-
cate combination of brightly lit mountains
and dark lava channels. Some call this
striking chiaroscuro the Horseshoe, while
others prefer the Lunar Lips. If we want to
assign a letter to it, I suppose the Lunar U
might be the closest approximation. But I
favor the hoofprint analogy. On older lunar
maps, you may find the area labeled Mount
Schneckenberg, which translates to “Snail
Mountain.” That odd name, bestowed by
the International Astronomical Union, has
since been retired.

(Lunar Day 7.3) Continuing our game of
lunar alphabet soup, return to our satellite
about an hour past the X’s peak time and
scan southward along the terminator. Can
you spot a slanted L just beyond Stof ler
Crater? The Lunar L was first noticed
— to my knowledge anyway — by Steve
Bellavia of Mattituck, New York. The L is
formed from a combination of the eastern
walls of craters Deluc, Deluc H, and Deluc
D combined with a ridge to their south, all
just coming into light.

(Lunar Day 7.3) You’re familiar with the
Loch Ness monster and the infamous

This image of the First Quarter Moon
shows the positions of the Lunar V
(top), the Lunar X (center), and
the Lunar L. The best time to
observe these three clair-
obscur effects is when
the Moon is seven
days old (that is,
seven days past
New Moon).

This shadow falling on the floor of
Ptolemaeus Crater may not have come from
the Loch Ness monster, but that didn’t stop
this photographer from dubbing it “Nessie.”
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