When December 21 coincides with the winter solstice, the Jupiter Belt, Saturn’s rings and some of its moons can be observed simultaneously through a telescope. Today, in many parts of Spain, clouds will make observations difficult.
After Gemini and the solar eclipse, the third astronomical event in December is The great combination of Jupiter and Saturn, Are the two largest planets in the solar system.In the past few months, they have gradually approached in the sky, but in this month, they have reached the smallest distance between them, namely December 21, Specifically.
He explained: “The line of sight between Jupiter and Saturn will be reduced to 1/10 degree, or equal, that is 6 minutes of arc, that is, 1/5 of the average diameter of the sun and moon,” Alfred Rosenberg, To promote astrophysicists in IAC.
“In fact, he added that their distance is so small that they can be observed through a telescope at the same time to distinguish the bands of Jupiter, Saturn’s rings and some of their moons. However, the actual distance between the two planets The distance will be about five times greater than the distance from the earth to the sun.”
It is easy to appreciate this event with the naked eye, because after sunset, they will disappear from the same position as our star did within a few hours, so pay attention to the sky every day after sunset. However, today’s dark clouds make it difficult to observe this historical combination in many parts of Spain.
In order to promote and guide activities related to this activity, Federation of Spanish Astronomical SocietiesIn cooperation with various institutions, a collection of observatories, amateur astronomers and universities on its website, these institutions are organized to disseminate this great “Meeting of giants“.