The night firmament promises a grand spectacle in the coming days, when a very thin crescent moon will cross the space between three planets. This celestial alignment, which will change every evening, precedes the arrival of the summer solstice, marking the shortest night of the year. Get ready to observe the astronomical highlights of the week beginning June 16, 2026, offering a unique panorama for enthusiasts.
How to observe Mercury at its greatest eastern elongation on June 16th
This Tuesday, June 16, after solar sunset, the planet Mercury will reach its greatest eastern elongation. Positioned low on the western horizon, this event will make it more easily visible, appearing far from the Sun. A delicate crescent moon, just one day old, will rise just below and to the right of Mercury, while Jupiter, further to the left and above, will display its intense glow.
Spectacular approach between the crescent Moon, Jupiter and Venus on June 17
On Wednesday, June 17, the western sky between dusk and twilight will show the crescent moon, now two days old, in close proximity to Jupiter. Further up and to the left, the planet Venus, affectionately known as the “evening star”, will shine with remarkable intensity, completing the stellar scene.
Triple Alignment: Crescent Moon, Venus, and the Praesepe Cluster on June 18
On Thursday, June 18, a remarkable celestial configuration can be seen on the western horizon from dusk to twilight. A thin crescent moon and Venus will appear aligned, but with a slight separation, with the Nativity star cluster, located in the constellation Cancer, visible between them. For a better observation of Venus and the Nativity cluster, it is recommended to use binoculars, which will bring them into the same field of view.
Regulus and the waxing Moon in close conjunction on the evening of June 19
Friday, June 19, will treat observers to a stellar conjunction after sunset. A crescent moon, already in its four-day lunar phase, will appear very close to Regulus. This is the most luminous first magnitude star in the constellation Leo, promising a visually interesting encounter in the firmament.
The meaning and arrival of the Summer Solstice on June 21st
The summer solstice will take place on Sunday, June 21st, at precisely 5:25 pm Japanese time. This day marks the point at which the Northern Hemisphere experiences the longest duration of sunlight of the year, being, consequently, the longest day with the least amount of darkness for this region of the planet.
Tips for following the dynamic lunar movement
The Moon stands out as the fastest moving celestial body, traveling approximately 13 degrees east on the celestial sphere each day. This distance is comparable to the width of a closed fist extended with your arm. Tracking its trajectory for three consecutive nights this week offers a unique opportunity to observe how it moves, day by day, between the different planets during its 29.5-day cycle of phases.
In the Northern Hemisphere, around the summer solstice, the Sun does not completely disappear below the horizon, which means that at higher latitudes, “true darkness” is less likely. However, this condition does not prevent astronomical observation. On the contrary, it suggests a change in focus. This period is ideal for focusing attention on objects that shine brightly even during twilight, such as the planets, the Moon itself and the most prominent stars, ensuring a sky rich in detail despite the residual luminosity.