Before our science topic of this Wednesday, first the latest in the politics of the USA. About Trump reciprocal taxes and Liberation Day, let's start by being realistic.  The U.S. has a sizable trade deficit every year mostly because our exported products are too expensive.  Start with a simple matter of what it costs to produce anything.  Unions are part of the problem, too, but workers here get paid from $30 to $40/hour in many industries.  That is what is earned by employees in China...but per day.  And that's high, for here is what is the  monthly wage in these Asian countries per month :  China $193-332, Vietnam $107-$156, India $74-$223 and Cambodia $122. In the Rose Garden at 4:10PM EDT today, you can yourself  watch President Donald Trump's Liberation Day remarks : Tariff speech shared some facts, exaggerated a lot, downright lied here and there, and continues the process of screwing up the best current economy of the world, ours. There wi...

The latest photos from the   James Webb Space Telescope   were again noteworthy.  While earlier shots peered deep into space, the newest two featured Jupiter: See that white spot?  This is the Great Red Spot, a storm so big that it could swallow Planet Earth.  Why is the color white?  That circle reflects a lot of sunlight.  This is the usual graphic. The image also shows two tiny moons, Amalthea and Adrastea.   How many of you know how many moons are circling Jupiter ?  There are 80, plus other moonlets.   The largest moons are Io, Europa, Ganymede and Callisto, all discovered by Galileo Galilei in 1610.  There is a naming-pattern to these moons:  lovers and sexual partners of Roman god Jupiter, or his Greek equivalent Zeus.  23 of them have yet to be named.  They should begin to add those of  Eros . Actually, there are Chinese astronomical records reporting in 356 BC that Gan De detected a moon of Jup...