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See 3 Moons of Jupiter Perform Rare Triple Transit TONIGHT!
23 Jan 2015 19:31 #1
by otisptoadwater
On Friday night (Jan. 23), observers all across North America will witness a rare event when three of Jupiter's moons, and their shadows, pass across the face of the giant planet.
How rare are these Jupiter triple transits? I have seen two in the last 15 years personally, but the next one will not occur until 2032.
The inky black shadows of the moons can be seen, under steady seeing conditions, with a 90mm aperture telescope. The shadows are very small, but very high-contrast. The moons themselves are more challenging. I have seen Ganymede and Callisto with a 127mm aperture, but Io and Europa are hard to see with my 280mm aperture, except just as they enter or leave Jupiter's disk. Io and Europa simply blend in with the cloudy surface of the planet.
Click here to read more.
I can explain it to you but I can't understand it for you.
"Any man who thinks he can be happy and prosperous by letting the Government take care of him; better take a closer look at the American Indian." - Henry Ford
Corruptissima re publica plurimae leges; When the Republic is at its most corrupt the laws are most numerous. - Publius Cornelius Tacitus
On Friday night (Jan. 23), observers all across North America will witness a rare event when three of Jupiter's moons, and their shadows, pass across the face of the giant planet.
How rare are these Jupiter triple transits? I have seen two in the last 15 years personally, but the next one will not occur until 2032.
The inky black shadows of the moons can be seen, under steady seeing conditions, with a 90mm aperture telescope. The shadows are very small, but very high-contrast. The moons themselves are more challenging. I have seen Ganymede and Callisto with a 127mm aperture, but Io and Europa are hard to see with my 280mm aperture, except just as they enter or leave Jupiter's disk. Io and Europa simply blend in with the cloudy surface of the planet.
Click here to read more.
I can explain it to you but I can't understand it for you.
"Any man who thinks he can be happy and prosperous by letting the Government take care of him; better take a closer look at the American Indian." - Henry Ford
Corruptissima re publica plurimae leges; When the Republic is at its most corrupt the laws are most numerous. - Publius Cornelius Tacitus
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