supermoon – Watch the Skies

See the Strawberry Moon – 2021’s Last Supermoon!

Our planet’s natural satellite – better known as the Moon – will appear opposite the Sun and fully illuminated on June 24, 2021, at 18:40 UTC, which is 1:40 p.m. CDT (UTC-5). This full Moon is quite special for two reasons: it’s a Strawberry Moon and the last supermoon of the year!

The Strawberry Moon marks the last full Moon of spring or the first full Moon of summer. Towards the end of June, the Moon usually sits in a lower position in the sky and shines through more of our atmosphere. Because of this, our Moon can sometimes give off a pinkish hue.

Surprisingly, the name likely has more to do with the time of the year it occurs than its unusual pink shade. Some Native American tribes referred to this full moon as the Strawberry Moon because it signaled a time for gathering ripening strawberries and other fruits.

A supermoon occurs when a full Moon coincides with the Moon’s closet approach to Earth in its elliptical orbit, a point known as perigee. During every 27-day orbit around Earth, the Moon reaches both its perigee, about 226,000 miles from Earth, and its farthest point, or apogee, about 251,000 miles from Earth.

Although supermoon is not an official astronomical term, it’s typically used to describe a full Moon that comes within at least 90% of perigee. In this phase, the Moon appears larger and brighter than usual. A new Moon can also be a supermoon. However, we typically do not see a new Moon since it is between Earth and the Sun, and therefore not illuminated.

If you’re in the daylight at the time of the Super Strawberry Moon, look for a better view during its moonrise, which is about 20 minutes after sunset, local time.

The Super Strawberry Moon will be the last of four supermoons for 2021. Supermoons only happen three to four times a year, and always appear consecutively. The last three supermoons occurred on May 26, April 27, and March 28.

Skywatchers, please enjoy the sunset in the west, and if you look toward the east, you may notice the subtle pink hue of our Super Strawberry Moon!

by Lance D. Davis

Rare Sights for Spring

As spring blooms in the Northern Hemisphere, here’s what’s happening in the night sky!

Venus
On April 3, Venus will pass near a star cluster known as the Pleiades. Also known as the Seven Sisters or M45, the Pleiades lies about 400 light years away from Earth, toward the constellation of the Bull — or Taurus.

Last year as Venus passed close to the Pleiades on June 9, the planet was five degrees south of the star cluster — 20 times farther away than it will be this year. Next year, Venus will be close to the star cluster once more on April 9 — this time at four degrees south of the Seven Sisters. This 2021 passing will be 16 times farther away than the 2020 event.

This year, viewers will have the rare chance at a brilliant view of Venus on April 3. With the naked eye, you will see something similar to the illustration below. However, the best view will be achieved through a pair of binoculars. Don’t miss your shot — Venus won’t make another appearance this close to the Pleiades until 2028!

This illustration -- generated by Bill Cooke using SkySafari Pro software -- captures what the naked eye might see as Venus passes through the Pleiades April 3, 2020. — This illustration — generated by Bill Cooke using SkySafari Pro software — captures what the naked eye might see as Venus passes through the Pleiades April 3, 2020.

Supermoon
We will have a Full Moon on April 7 at 9:35 p.m. CDT, at which time the Moon will be near to its perigee — or the point in its orbit that it is closest to Earth. This proximity will provide the largest appearance of the Moon for the whole year, commonly called a supermoon.

With the Artemis Program, NASA will land the first woman and next man on the Moon by 2024, using innovative technologies to explore more of the lunar surface than ever before. We will collaborate with our commercial and international partners and establish sustainable exploration by 2028. Until that day arrives, the supermoon will put us all a bit closer (physically) to our goal!

Comet C/2019 Y4 ATLAS
NASA astronomer Tiffany Clements recently captured the below image of Comet C/2019 Y4 ATLAS using a wide field telescope in New Mexico. Discovered at the end of December 2019 by an automated sky survey searching for Earth-approaching asteroids, this comet could brighten enough to be visible by late May or early June. However, comets are notoriously unpredictable, so stay tuned!

Comet C/2019 Y4 ATLAS (Credits: NASA/Tiffany Clements)

Here Comes the Sun… and Moon!

Happy equinox, Earthlings! March 20 marks the spring equinox, one of two seasonal markers in Earth’s year-long orbit when the Sun appears to shine directly over the equator, and daytime and nighttime are nearly equal lengths–12 hours–everywhere on the planet.

During the equinoxes, both hemispheres receive equal amounts of daylight. (Image not to scale.) (NASA/GSFC/Genna Duberstein)

It’s the start of astronomical spring in the Northern Hemisphere, meaning more sunlight and longer days. From here until the beginning of fall, daytime will be longer than nighttime as the Sun travels a longer, higher arc across the sky each day, reaching a peak at the start of summer. It’s just the opposite in the Southern Hemisphere, where March 20 marks the fall equinox.

What’s more? The first full Moon of spring will rise tonight, lighting the skies on the equinox. Usually, a full Moon arrives a few days to weeks before or after the equinox. It’s close, but not a perfect match. Tonight’s full Moon, however, reaches maximum illumination less than four hours after the equinox. There hasn’t been a comparable coincidence since the spring equinox in 2000.

When the Moon, on its orbit around Earth, reaches the point farthest from the Sun, we see a full Moon. (NASA/GSFC/Genna Duberstein)

And because the Moon is near perigee, it qualifies as a supermoon–the third and final of 2019. It’s not a big supermoon, so you won’t really be able to see the difference between this full Moon and any other one with your eyes. But keep an keep an eye on the Moon as it rises and creeps above the eastern skyline. A low-hanging Moon can appear strangely inflated. This is the Moon illusion at work.

Super or seemingly not, it’s a rare celestial coincidence to usher in springtime.