Jupiter and Earth just past its closest, now at opposition

Giant Jupiter is closest to Earth for 2023 on November 1-2. Then Earth will fly between the sun and Jupiter - bringing Jupiter to opposition - on November 2-3.

Year’s earliest solar noon on November 3

November 3 brings the year's earliest solar noon - that is, earliest midday - by nature's clock. It's a harbinger of the Northern Hemisphere's earliest sunset.

Why is Jupiter closest to Earth 1 day before opposition?

Jupiter's perihelion, closest point to the sun in 2023, is on November 1-2. The distance between the sun and Jupiter will be 369,964,113 miles (595,399,525 km).

Halloween is an astronomy holiday. It’s a cross-quarter day

A cross-quarter day falls between an equinox and a solstice. Halloween is the year's 4th cross-quarter day and the spookiest of the 4.

Don’t miss! Hunter’s Moon 2023 and Jupiter tonight

Find the date and time of the Northern Hemisphere's full Hunter's Moon for October 2021, and learn why this moon brightens the evening for a string of days.

Some will see a partial lunar eclipse tonight

A shallow partial lunar eclipse takes place on October 28, 2023, visible in Europe, Africa, most of Asia and western Australia. Jupiter is the bright object nearby. Maps and details here.

Proxima Centauri, the closest star to our sun

Proxima Centauri is the nearest star to our sun at 4.22 light-years away. It's home to at least 2 planets and has massive solar flares.

Jupiter’s moons: How to see and enjoy them

October and November 2023 are great months for seeing Jupiter's moons Io, Europa, Ganymede and Callisto with binoculars or a small telescope.

Venus before sunrise: See it around October 23!

Look for Venus before sunrise. It'll reach greatest elongation - its greatest distance from the sunrise - on October 23, 2023. It's blazingly bright! Can't miss it!

International Observe the Moon Night October 21

International Observe the Moon Night is October 21, 2023. It's a global event for celebrating the moon. Here's how you can participate online or in person.