Gemini's 2 brightest stars - Castor and Pollux - represent twins in many cultures.

Gemini's 2 brightest stars - Castor and Pollux - represent twins in many cultures.

Positions of the 4 visible planets during totality in the August 21, 2017 eclipse. Illustration by Eddie Irizarry using Stellarium.

Positions of the 4 visible planets during totality in the August 21, 2017 eclipse. Illustration by Eddie Irizarry using Stellarium.

The Southern Cross climbs highest - due south - in the evening around now. Latitudes like Hawaii can see it. It

The Southern Cross climbs highest - due south - in the evening around now. Latitudes like Hawaii can see it. It

Venus is brighter around February 16-17, 2017 than at any other time during its ongoing, approximate, 9.6-month reign in the evening sky.

Venus is brighter around February 16-17, 2017 than at any other time during its ongoing, approximate, 9.6-month reign in the evening sky.

The Big Dipper is easy. And, once you find it, you can find the Little Dipper, too.  Plus … learn how the stars of the Big Dipper are moving in space.

The Big Dipper is easy. And, once you find it, you can find the Little Dipper, too. Plus … learn how the stars of the Big Dipper are moving in space.

Come to know this star and be one step further along the path of finding the Andromeda galaxy.

Come to know this star and be one step further along the path of finding the Andromeda galaxy.

The near-Earth asteroid 2017 FU102 has a very close, but safe, encounter with Earth on April 2, 2017, sweeping to within just over half the moon's distance.

The near-Earth asteroid 2017 FU102 has a very close, but safe, encounter with Earth on April 2, 2017, sweeping to within just over half the moon's distance.

Innermost Mercury - and distant Uranus - are low in the western sky after sunset. Start looking for them as soon as your sky begins to darken.

Innermost Mercury - and distant Uranus - are low in the western sky after sunset. Start looking for them as soon as your sky begins to darken.

Orange Arcturus is the constellation Bootes the Herdsman's brightest star. Look for it in the east around nightfall.

Orange Arcturus is the constellation Bootes the Herdsman's brightest star. Look for it in the east around nightfall.

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