What’s that bright star near the Moon?

It’s a commonly asked question. As the Moon makes its regular orbital journey around the sky, it sometimes appears close to a particularly bright “star”.

Often these stars are not stars at all but planets. Mercury, Venus, Mars, Jupiter and Saturn can all appear close to the Moon. That is because their orbits around the Sun are on a similar plane to the Moon’s around the Earth.

These planets also appear much brighter than most stars. Apart from the planets, a handful of first-magnitude stars – some of the brightest in the sky – also lie along the path travelled by the Moon, and so you might spot one close to it.

Occasionally, the Moon will actually pass in front of and hide a star or planet. Such an event is known as an occultation.

Here is a list of dates when the Moon may be seen close to a bright planet or star.

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2022

January 4: Saturn
January 5-6: Jupiter
January 13: Aldebaran
January 17: Pollux
January 20: Regulus
January 25: Spica
January 28: Antares
January 29: Venus

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February 3: Jupiter
February 9: Aldebaran
February 13-14: Pollux
February 16: Regulus
February 21: Spica
February 24: Antares
February 26: Venus

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March 9: Aldebaran
March 13: Pollux
March 16: Regulus
March 20: Spica
March 24: Antares
March 27-28: Venus

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April 5: Aldebaran
April 9: Pollux
April 13: Regulus
April 16-17: Spica
April 20: Antares
April 25-26: Saturn and Mars
April 27: Venus and Jupiter

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May 2: Mercury and Aldebaran
May 6: Pollux
May 10: Regulus
May 14: Spica
May 17: Antares
May 22: Saturn
May 24-25: Mars and Jupiter
May 26-27: Venus

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The bright stars that can lie close to the Moon all lie in constellations of the Zodiac. That’s because the Moon’s path through the heavens stays close to the ecliptic, the imaginary line around the celestial sphere marking the plane of the Earth’s own orbit around the Sun.

If you could switch off daylight, you would see that the Sun travels the full length of the ecliptic over the course of each year.

In order of brilliance, the brightest stars that can therefore be seen near the Moon are Aldebaran in Taurus, Antares in Scorpius, Spica in Virgo, Pollux in Gemini, and Regulus in Leo. They are all “first magnitude” stars.

But the brightest “stars” that you may spot near the Moon are not going to be stars at all, but rather the planets Venus, Mars, Jupiter and Saturn. One might add Mercury, the innermost planet in the Solar System, though it is never seen in a dark sky, and so is less likely to be noticed, especially as the Moon will be a very fine crescent when near to it.

Related: What to see in the night sky this month