161.

1 Ceres at solar conjunction 1 Ceres 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, 17 May 1980 at 01:20 EDT (16,047 days ago) in Taurus

162.

Mercury at perihelion Mercury passes its orbit's closest point to the Sun. Sat, 17 May 1980 at 02:56 EDT (16,047 days ago) in Taurus

163.

Lunar occultation of Regulus The Moon will pass in front of Regulus (Alpha Leonis), creating a lunar occultation visible from Africa, Maldives, Saudi Arabia, Yemen and British Indian Ocean Territory. Wed, 21 May 1980 at 12:38 EDT (16,043 days ago) in Leo

164.

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. Wed, 21 May 1980 at 15:16 EDT (16,043 days ago) in Leo

165.

Close approach of the Moon and Jupiter The Moon and Jupiter pass close to each other. Wed, 21 May 1980 at 16:02 EDT (16,043 days ago) in Leo

166.

Lunar occultation of Jupiter The Moon will pass in front of Jupiter, creating a lunar occultation visible from countries and territories including Brazil, Argentina, Peru and Bolivia amongst others. Wed, 21 May 1980 at 16:02 EDT (16,043 days ago) in Leo

167.

Conjunction of the Moon and Jupiter The Moon and Jupiter share the same right ascension, at a separation of 34'. Wed, 21 May 1980 at 16:21 EDT (16,043 days ago) in Leo

168.

Close approach of the Moon and Mars The Moon and Mars pass close to each other. Thu, 22 May 1980 at 01:45 EDT (16,042 days ago) in Leo

169.

Lunar occultation of Mars The Moon will pass in front of Mars, creating a lunar occultation visible from countries and territories including Fiji, French Polynesia, Samoa and Tonga amongst others. Thu, 22 May 1980 at 01:45 EDT (16,042 days ago) in Leo

170.

Conjunction of the Moon and Mars The Moon and Mars share the same right ascension, at a separation of 25'. Thu, 22 May 1980 at 02:00 EDT (16,042 days ago) in Leo

171.

Saturn ends retrograde motion Saturn returns to its usual eastward motion after opposition. Thu, 22 May 1980 at 07:36 EDT (16,042 days ago) in Leo

172.

Close approach of the Moon and Saturn The Moon and Saturn pass close to each other. Fri, 23 May 1980 at 06:16 EDT (16,041 days ago) in Leo

173.

Lunar occultation of Saturn The Moon will pass in front of Saturn, creating a lunar occultation visible from countries and territories including Australia, Indonesia, Papua New Guinea and Philippines amongst others. Fri, 23 May 1980 at 06:16 EDT (16,041 days ago) in Leo

174.

Conjunction of the Moon and Saturn The Moon and Saturn share the same right ascension, at a separation of 4'20". Fri, 23 May 1980 at 06:18 EDT (16,041 days ago) in Leo

175.

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. Sat, 24 May 1980 at 07:26 EDT (16,040 days ago) in Virgo

176.

Full Moon The Moon reaches full phase and is visible for much of the night. Thu, 29 May 1980 at 17:27 EDT (16,035 days ago) in Ophiuchus

177.

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. Fri, 30 May 1980 at 23:00 EDT (16,034 days ago) in Ophiuchus

178.

Close approach of Venus and Mercury Venus and Mercury pass within 19' of each other. Sun, 01 Jun 1980 at 13:11 EDT (16,032 days ago) in Gemini

179.

Conjunction of Venus and Mercury Venus and Mercury share the same right ascension, at a separation of 19'. Sun, 01 Jun 1980 at 13:30 EDT (16,032 days ago) in Gemini

180.

Moon at Last Quarter The Moon reaches last quarter phase – rising in the east at around midnight and appearing high in the sky by sunrise. Thu, 05 Jun 1980 at 22:53 EDT (16,028 days ago) in Aquarius