601.

Saturn at opposition Saturn lies in the opposite direction to the Sun in the sky, making it slightly closer, brighter and larger than at other times. It is also optimally positioned to be observable for much of the night. Sun, 21 Sep 2025 at 01:37 EDT (448 days away) in Pisces

602.

Partial solar eclipse There will be an eclipse of the Sun, visible from Antarctica and Oceania. Sun, 21 Sep 2025 at 15:42 EDT (448 days away) in Virgo

603.

New Moon The Moon disappears into the Sun's glare for a few days. Sun, 21 Sep 2025 at 15:55 EDT (448 days away) in Virgo

604.

September equinox Day and night have equal length, marking the beginning of autumn in the northern hemisphere and spring in the southern hemisphere. Mon, 22 Sep 2025 at 14:20 EDT (449 days away) in Virgo

605.

Neptune at opposition Neptune lies in the opposite direction to the Sun in the sky, making it optimally positioned to be observable for much of the night. Tue, 23 Sep 2025 at 08:45 EDT (450 days away) in Pisces

606.

Conjunction of the Moon and Mars The Moon and Mars share the same right ascension, at a separation of 3°56'. Wed, 24 Sep 2025 at 10:51 EDT (451 days away) in Virgo

607.

The Moon at perihelion The Moon passes its orbit's closest point to the Sun, which happens each month around the time of new moon. Wed, 24 Sep 2025 at 17:45 EDT (451 days away) in Virgo

608.

NGC 55 is well placed NGC 55 (mag 8.2), a barred irregular galaxy in Sculptor culminates at around midnight local time. Wed, 24 Sep 2025 (451 days away) in Sculptor

609.

The Moon at apogee The Moon recedes to its orbit's furthest point from the Earth, making it appear fractionally smaller than at other times of the month. Fri, 26 Sep 2025 at 05:45 EDT (453 days away) in Libra

610.

Daytime Sextantid meteor shower 2025 The Daytime Sextantid meteor shower reaches its peak. Sat, 27 Sep 2025 (454 days away) in Sextans

611.

Lunar occultation of Antares The Moon will pass in front of Antares (Alpha Scorpii), creating a lunar occultation visible from Antarctica, French Southern Territories and Bouvet Island. Sat, 27 Sep 2025 at 14:05 EDT (454 days away) in Scorpius

612.

47 Tuc is well placed The second brightest globular cluster in the sky, 47 Tuc (NGC 104; mag 4.0), in Tucana culminates at around midnight local time. Sat, 27 Sep 2025 (454 days away) in Tucana

613.

Moon at First Quarter The Moon reaches first quarter phase – appearing high in the sky at sunset and setting in the west at around midnight. Mon, 29 Sep 2025 at 19:54 EDT (456 days away) in Sagittarius

614.

Venus at perihelion Venus passes its orbit's closest point to the Sun. Thu, 02 Oct 2025 at 07:34 EDT (459 days away) in Leo

615.

The Andromeda Galaxy is well placed The Andromeda Galaxy M31 (mag 3.4) culminates at around midnight local time. Thu, 02 Oct 2025 (459 days away) in Andromeda

616.

1 Ceres at opposition 1 Ceres lies in the opposite direction to the Sun in the sky, making it closer and brighter than at other times. It is also optimally positioned to be observable for much of the night. Thu, 02 Oct 2025 at 23:15 EDT (459 days away) in Cetus

617.

NGC 253 is well placed The Sculptor Galaxy NGC 253 (mag 7.1) culminates at around midnight local time. Fri, 03 Oct 2025 (460 days away) in Sculptor

618.

136472 Makemake at solar conjunction 136472 Makemake is unobservable as it passes around the far side of the Sun – marking the end of one apparition and the beginning of the next. Sat, 04 Oct 2025 at 09:56 EDT (461 days away) in Coma Berenices

619.

The Moon at aphelion The Moon recedes to its orbit's furthest point from the Sun, which happens each month around the time of full moon. Sat, 04 Oct 2025 at 10:10 EDT (461 days away) in Aquarius

620.

The Small Magellanic Cloud is well placed The Milky Way's dwarf companion, the Small Magellanic Cloud (SMC; mag 2.7), in Tucana culminates at around midnight local time. Sat, 04 Oct 2025 (461 days away) in Tucana