Moon and Venus in October 2021
The brightest planet, Venus, has been within the west after sundown for some months. Now, certainly one of northern summer time’s most beloved stars, Antares in Scorpius, is close to Venus within the western twilight. And, starting round October 7, 2021 – or maybe extra realistically for Northern Hemisphere viewers, October 8 – you will note the younger moon return to the night sky to comb previous Venus over a number of evenings. Their actual conjunction will happen on October 9 round 19 UTC. That’s when Venus and the moon may have the identical right ascension (corresponding to earthly longitude) on the sky’s dome. However don’t let that date or time fear you. Look ahead to the moon and Venus on all of those evenings. Simply make sure you catch them quickly after sundown. They’ll rapidly comply with the solar beneath the western horizon.
All these objects are simply shiny sufficient to resist the glow of night twilight. However, for us within the Northern Hemisphere, the problem in seeing the moon, Venus and Antares in October 2021 would be the slender autumn angle of the ecliptic. The ecliptic is the solar’s path in our sky. The moon and planets journey alongside it, too. As seen from northerly latitudes, the ecliptic lies close to the horizon within the night twilight sky. And thus the moon, Venus and Antares will seem properly to 1 aspect of the sundown level (to the left of the sundown level, as you stand going through west).
From the Southern Hemisphere, the season is reversed. It’s spring in that hemisphere now, and the springtime ecliptic makes a steep angle with the horizon within the night. The Southern Hemisphere may have an excellent view of the moon and Venus on October 7, 8, 9 and 10.
After about October 10, the moon may have waxed to a fats crescent within the night sky. First quarter moon will come on October 12 by clocks in North America (October 13 at 3:25 UTC). And the total moon will come on October 20.
In the meantime, preserve watching the western skies for Venus and Antares. They’ll have their very own conjunction (once they’ll be closest in proper ascension) on October 16. Afterwards, Antares will slip into the sundown glare to be gone for an additional season. However Venus will proceed to extend its distance from the sundown (nonetheless transferring largely sideways, to the left of the sundown level, as seen from our northerly latitudes). Venus will lastly attain the tip of its tether with respect to the solar on October 29. Astronomers name this occasion a greatest elongation of Venus.
Sneak peak of recent charts from Man Ottewell
By the way in which, in the event you’ve been following EarthSky, you understand how a lot we worth the chart-making expertise of Man Ottewell within the U.Okay. See some examples of Guy’s charts at EarthSky here. He’s simply now growing a brand new set of charts for every month, which he calls pairs diagrams, displaying the ten greatest views within the morning and night sky every month. Under are Man’s pairs diagrams for the sweep of the moon previous Venus and Antares on October 7 to 10. Look ahead to his pairs diagrams in 2022! And see more of Guy’s work at UniversalWorkshop.
Backside line: The younger moon and Venus shall be close to one another within the sky from about October 7 to 10, 2021. The Southern Hemisphere has the perfect view!
https://earthsky.org/tonight/moon-and-venus-oct-7-8-9-10-2021/ | Moon and Venus on October 7, 8, 9 and 10