January Belongs To Jupiter See The King Of Planets In The Night Sky This Month
January Belongs To Jupiter See The King Of Planets In The Night Sky This Month
Jupiter, the largest planet in the solar system, currently shines as a brilliant silvery “star” in Gemini the Twins, low in the east-northeast sky as dusk slowly fades. It forms an eye-catching scalene triangle configuration with the “Twin Stars” Pollux and Castor; you really can’t miss it.
And at 4 a.m. EST (0900 GMT) on Saturday (Jan. 10),Jupiterwill arrive at that point in the sky directly opposite tothe suncalled “opposition.” If all the planets’ paths around the sun were true circles, this would also coincide with Earth’s closest approach to Jupiter, 393.3 million miles (632.9 million kilometer).
That, however, occurs 25 hours earlier, at 3 a.m. EST (0800 GMT) on Friday (Jan. 9).
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Jupiter will reach its farthest point from the sun — its aphelion point, which takes it 507 million miles (815.7 million km) from our star — on Dec. 28, 2028.
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‘Big Jupe’ almost became a star
Jupiter constantly is the most interesting object in the solar system afterthe moonand the sun and has always held a special place in the hearts of telescope viewers. Jupiter provides telescope users with a feast of features:a restless atmosphereand aretinue of bright satellites.
This giant planet — which has nearly 2.5 times mass than all of the other planets put together — takes nearly 12 Earth years to go once around the sun. Thus, it spends roughly a year within each of the12 zodiacal constellationssince the constellations are of unequal width.
With an equatorial diameter of 88,846 miles (142,984 km), Jupiter is the largest planet: a colossal ball of hydrogen and helium without a solid surface. Scientists are currently uncertain about the exact nature of Jupiter’s core, but modern data suggests it is not the solid, compact rocky ball once imagined.
Recent findings from NASA’sJuno missionand updated scientific models suggest that, instead of a sharp boundary between a solid core and the rest of the planet, Jupiter likelyhas a “dilute” core. This means that heavy elements like rock and metal are dissolved and encased in a thick mantle of metallic hydrogen enveloped in a massive atmospheric cloak of multi-colored clouds ofammonium hydrosulphide.
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And, in a strange sense, Jupiter might even be referred to as a stillbornstarfor it has the makings (mostly hydrogen) if not the mass of a stellar body. Its relative smallness, however, prevents the initiation of the nuclear processes that could have turned it into a full-fledged star. Had Jupiter been born a bit bigger, we would have the distinction of living within abinary starsystem.
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Cloud bands and satellites
Binocularsshow Jupiter as a tiny disk, while a medium-sizetelescopereveals numerous dark belts, light zones and a wealth of festoons, garlands, ovals and other features extending here and there. Jupiter’s rotation is the fastest of all the solar system’s planets. It completes a rotation on its axis in slightly less than 10 hours, which creates an equatorial bulge easily perceived through most telescopes. And January offers nearly optimum views of its intricate cloud features; it’s even possible at mid-northern latitudes to observe every longitude of the planet during the long night.
Besides its prominent cloud belts, Jupiter’s greatest telescopic treasure are its fourGalilean moonsthat run a merry race with each other around the planet, changing their respective positions from hour to hour and night to night. The smallest of telescopes – even steadily held 7-power binoculars – will reveal these four bright satellites of Jupiter as tiny stars nearly in line and changing their places in the line as they revolve around the planet in orbits nearly edgewise to us. Typically, at least two or three are visible at any given moment.
On Saturday (Jan. 10), for example, we will see three satellites on one side of Jupiter (going outward from the planet:Ganymede,IoandEuropa), while the fourth (Callisto) remains all by itself on Jupiter’s opposite side.
Coming attractions
Jupiter will appear to climb higher in the evening sky in the weeks to come. Currently, the giant planet is ready for telescopic observation by 7 p.m., when it will stand one-third of the way up from the eastern horizon to that point directly overhead (called the zenith). It reaches its highest position in the south around midnight and is heading toward its setting in the west during dawn. After the glory of its opposition on the midnight meridian, Jupiter will appear a bit higher in the east each evening and will engage its stellar neighbors,PolluxandCastorin a sort of celestialno threein the coming weeks.
On the evening of Feb. 27, the scalene triangle will have changed into a narrow isosceles, and nearly aligned with Pollux and Castor will be awaxing gibbous moon. But the real show occurs in late May and early June, when a fascinating dance of three planets and the moon will provide evening enchantment. On the evening of May 20, a crescent moon will be positioned well to the upper left of Jupiter.
During the final week of May, one hour after sunset, you can watch howVenusclimbs to meet Jupiter. On June 9, they’ll call attention to themselves low in the west-northwest sky. Finally, on June 16, a slender crescent moon will appear to the right of Jupiter, and below the moon will sit yet another planet,Mercury.
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The heavenly ballet continuously being performed by these “wandering stars” has played a crucial role in the celestial lore of all people. It is not surprising that they were regarded as deities.
The five naked-eye planets (Mercury, Venus, Mars, Jupiter andSaturn) have been known since antiquity, and it is also interesting that the members of this quintet have all been examined closely by space probes. Of course, before the advent of the telescope, virtually all peoples regarded planets as a special category of star.
Over the following month, Jupiter sinks into the sun’s glare. Emerging into the morning sky of August, he will progress into the constellation ofCancer the Craband on Sept. 24 he will cross over into the western boundary ofLeo the Lionwhere he will remain for the balance of the year. A spectacular eclipse (occultation) of Jupiter will await early risers across much of North America on Oct. 6, and a brighteningMarswill closely pass north of Jupiter on Nov.
16. On Dec. 13, Jupiter will begin to swirl backward into the next loop that will climax in the opposition of Feb. 10, 2027.
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Joe Rao serves as an instructor and guest lecturer at New York’sHayden Planetarium. He writes about astronomy forNatural History magazine,Sky and Telescopeand other publications.
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Published on:2026-01-07 21:00:00
Source: www.space.com
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Author: uaetodaynews
Published on: 2026-01-07 17:29:00
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