Astronomy Calendar

• 1
  Close approach of the Moon and M45  Remind MeThe Moon and M45 pass close to each other.
  The Sombrero Galaxy is well placed  Remind MeThe Sombrero Galaxy M104 (NGC 4594; mag 8.6) in Virgo culminates at around midnight local time.
• 2
  Close approach of the Moon and Jupiter  Remind MeThe Moon and Jupiter pass close to each other.
  Conjunction of the Moon and Jupiter  Remind MeThe Moon and Jupiter share the same right ascension, at a separation of 5°30'.
  Lunar occultation of Beta Tauri  Remind MeThe Moon will pass in front of Beta Tauri (Elnath), creating a lunar occultation visible from Oceania, Eastern and Southeast Asia, Federated States of Micronesia, Spratly Islands and Paracel Islands.
• 4
  Messier 94 is well placed  Remind MeM94 (mag 8.2), a spiral galaxy in Canes Venatici culminates at around midnight local time.
  Moon at First Quarter  Remind MeThe Moon reaches first quarter phase – appearing high in the sky at sunset and setting in the west at around midnight.
• 5
  Conjunction of the Moon and Mars  Remind MeThe Moon and Mars share the same right ascension, at a separation of 2°09'.
  Close approach of the Moon and Mars  Remind MeThe Moon and Mars pass close to each other.
  The Jewel Box cluster is well placed  Remind MeThe Jewel Box open star cluster (NGC 4755, also known as the Kappa Crucis Cluster; mag 4.2) in Crux culminates at around midnight local time.
• 12
  Full Moon  Remind MeThe Moon reaches full phase and is visible for much of the night.
  Lunar occultation of Spica  Remind MeThe Moon will pass in front of Spica (Alpha Virginis), creating a lunar occultation visible from Latin America and the Caribbean, Saint Helena, South Africa, Bonaire, Saint Eustatius and Saba, Bouvet Island and Grenada.
• 13
  The Moon at apogee  Remind MeThe Moon recedes to its orbit's furthest point from the Earth, making it appear fractionally smaller than at other times of the month.
  Centaurus A is well placed  Remind MeCentaurus A (NGC 5128; mag 7.0) culminates at around midnight local time.
  Omega Centauri is well placed  Remind MeThe brightest globular cluster in the sky, Omega Centauri (mag 3.6) culminates at around midnight local time.
• 14
  136199 Eris at solar conjunction  Remind Me136199 Eris is unobservable as it passes around the far side of the Sun – marking the end of one apparition and the beginning of the next.
  The Whirlpool Galaxy is well placed  Remind MeThe Whirlpool Galaxy M51 (NGC 5194; mag 8.4) in Canes Venatici culminates at around midnight local time.
• 15
  The Moon at aphelion  Remind MeThe Moon recedes to its orbit's furthest point from the Sun, which happens each month around the time of full moon.
• 16
  Conjunction of Mercury and Neptune  Remind MeMercury and Neptune share the same right ascension, at a separation of 41'.
  Mars at aphelion  Remind MeMars passes the furthest point along its orbit from the Sun.
  Lunar occultation of Antares  Remind MeThe Moon will pass in front of Antares (Alpha Scorpii), creating a lunar occultation visible from countries and territories including Antarctica, South Africa, Namibia and Botswana amongst others.
  Messier 83 is well placed  Remind MeThe Southern Pinwheel Galaxy M83 (NGC 5236; mag 7.2), a face-on spiral galaxy in Hydra culminates at around midnight local time.
• 17
  Mercury at aphelion  Remind MeMercury passes the furthest point along its orbit from the Sun.
  Messier 3 is well placed  Remind MeThe globular cluster M3 (NGC 5272; mag 6.3) in Canes Venatici culminates at around midnight local time.
• 19
  Mercury at highest altitude in morning sky  Remind MeMercury is bright and well placed in the dawn sky.
• 20
  Moon at Last Quarter  Remind MeThe Moon reaches last quarter phase – rising in the east at around midnight and appearing high in the sky by sunrise.
• 21
  Mercury at greatest elongation west  Remind MeMercury is bright and well placed in the dawn sky.
  136108 Haumea at opposition  Remind Me136108 Haumea lies in the opposite direction to the Sun in the sky, making it optimally positioned to be observable for much of the night.
• 22
  Lyrid meteor shower 2025  Remind MeThe Lyrid meteor shower reaches its peak.
  Messier 101 is well placed  Remind MeThe Pinwheel Galaxy M101 (NGC 5457; mag 7.9) in Ursa Major culminates at around midnight local time.
• 23
  π-Puppid meteor shower 2025  Remind MeThe π-Puppid meteor shower reaches its peak.
• 24
  Venus at greatest brightness  Remind MeVenus reaches its greatest brightness in the dawn sky.
  Mercury at dichotomy  Remind MeMercury reaches half phase in the dawn sky.
  Conjunction of the Moon and Venus  Remind MeThe Moon and Venus share the same right ascension, at a separation of 2°23'.
  Close approach of the Moon and Saturn  Remind MeThe Moon and Saturn pass close to each other.
  Close approach of the Moon and Venus  Remind MeThe Moon and Venus pass close to each other.
  Conjunction of the Moon and Saturn  Remind MeThe Moon and Saturn share the same right ascension, at a separation of 2°17'.
• 25
  The Moon at perihelion  Remind MeThe Moon passes its orbit's closest point to the Sun, which happens each month around the time of new moon.
  Conjunction of the Moon and Mercury  Remind MeThe Moon and Mercury share the same right ascension, at a separation of 4°23'.
• 27
  The Moon at perigee  Remind MeThe Moon makes its monthly closest approach to the Earth, making it appear fractionally larger than at other times of the month.
  New Moon  Remind MeThe Moon disappears into the Sun's glare for a few days.
• 28
  Close approach of Venus, Saturn and Neptune  Remind MeVenus, Saturn and Neptune pass within 3°42' of one another.
  Conjunction of Venus and Saturn  Remind MeVenus and Saturn share the same right ascension, at a separation of 3°43'.
• 29
  Close approach of the Moon and M45  Remind MeThe Moon and M45 pass close to each other.
• 30
  Close approach of the Moon and Jupiter  Remind MeThe Moon and Jupiter pass close to each other.
  Conjunction of the Moon and Jupiter  Remind MeThe Moon and Jupiter share the same right ascension, at a separation of 5°23'.
  Lunar occultation of Beta Tauri  Remind MeThe Moon will pass in front of Beta Tauri (Elnath), creating a lunar occultation visible from countries and territories including Brazil, Liberia, Sierra Leone and Guinea amongst others.