▪
umbra
-
The dark, central part of a shadow. Observers of a total solar eclipse are in the umbra of the Moon.
▪
U.T. (Universal Time) - Universal Time is the time kept by astronomers to eliminate the confusion of time zones. Let’s say that a particular event is
predicted to occur on one of the moons of Jupiter. What time do you give for this prediction? Every astronomer on Earth would want to use same
same time on their clock. That is where universal time comes in. U.T. is the time in Greenwich England. It happens to be five hours ahead of
Eastern Standard Time, Four hours ahead of Eastern Daylight Time. The current Universal Time will always be found in the upper right corner of the
Carpe Caelum website.
▪
virga
-
precipitation
that
does
not
reach
the
surface
of
a
planet
due
to
evaporation
in
a
hot
atmosphere.
The
sulfuric
acid
rain
of
Venus
does
not
manage to reach the ground.