Looking for what to see in the sky this week? This guide highlights the upcoming astronomical events. Scroll down for sky maps and viewing tips, and use the Sky Tonight app to check when and where ...

On September 20, 1951, a rhesus monkey named Yorick returned to Earth after a high-altitude rocket flight. He was the first ...

During the vernal equinox, the Sun is exactly above the equator, and day and night are nearly equal in length. Here are the dates of the vernal equinox in 2027 for the Northern and Southern ...

During the autumnal equinox, the Sun is exactly above the equator, and day and night are nearly equal in length. Here are the dates of the autumnal equinox in 2027 for the Northern and Southern ...

Antares, the “rival of Mars”, is a supergiant star that appears as a bright reddish dot to the naked eye. To easily find Antares in the sky from your exact location, use the free Star Walk 2 app. Read ...

Want to know which planets are visible tonight? Here’s a regularly updated guide to the visibility of Mercury, Venus, Mars, Jupiter, Saturn, Uranus, and Neptune. Below, you’ll find which planets can ...

Pollux is the brightest star in the constellation Gemini. It’s an orange giant, it’s brighter than its “twin” star Castor, and it hosts a confirmed planet. The free Sky Tonight app can show you ...

Astronomy Day is an annual event held on Saturday between mid-April and mid-May on or just before the first quarter Moon. But apart from this day, there are some other special dates that are related ...

The next Astronomy Day is Saturday, September 19, 2026 — and this year, it shares the date with International Observe the Moon Night. That gives you two reasons to look up! Start with the Moon, find a ...

La sexta fase del ciclo lunar; ocurre entre la Luna Llena y el último cuarto de Luna. Las fases menguantes representan a la Luna volviéndose menos iluminada, así que al inicio de esta fase, vemos un ...

Se quiser ter um Calendário Lunar completo no seu bolso, descarregue a aplicação gratuita Sky Tonight. Informará a fase da Lua de hoje, horas exatas do nascer e do pôr da lua para a sua localização, ...

The Winter Hexagon – also known as the Winter Circle, Great Hexagon, and the Winter Football – is a large asterism, not a constellation. The stars in the Winter Hexagon are parts of six different ...