An annular solar eclipse occurred on January 4, 1973, with an eclipse magnitude of 0.9303. A solar eclipse occurs when the

Moon The Moon is Earth's only natural satellite. It is the fifth largest satellite in the Solar System and the largest and most massive relative to its parent planet, with a diameter about one-quarter that of Earth (comparable to the width of ...

passes between

Earth Earth is the third planet from the Sun and the only astronomical object known to harbor life. While large volumes of water can be found throughout the Solar System, only Earth sustains liquid surface water. About 71% of Earth's surfa ...

and the

Sun The Sun is the star at the center of the Solar System. It is a nearly perfect ball of hot plasma, heated to incandescence by nuclear fusion reactions in its core. The Sun radiates this energy mainly as light, ultraviolet, and infrared radi ...

, thereby totally or partly obscuring the image of the Sun for a viewer on Earth. An annular solar eclipse occurs when the Moon's

apparent diameter The angular diameter, angular size, apparent diameter, or apparent size is an angular distance describing how large a sphere or circle appears from a given point of view. In the vision sciences, it is called the visual angle, and in optics, it is ...

is smaller than the Sun's, blocking most of the Sun's light and causing the Sun to look like an annulus (ring). An annular eclipse appears as a partial eclipse over a region of the Earth thousands of kilometres wide. Annularity was visible from

Chile Chile, officially the Republic of Chile, is a country in the western part of South America. It is the southernmost country in the world, and the closest to Antarctica, occupying a long and narrow strip of land between the Andes to the east a ...

and

Argentina Argentina (), officially the Argentine Republic ( es, link=no, República Argentina), is a country in the southern half of South America. Argentina covers an area of , making it the second-largest country in South America after Brazil, th ...

Related eclipses

Eclipses in 1973

* An annular solar eclipse on Thursday, 4 January 1973. * A penumbral lunar eclipse on Thursday, 18 January 1973. * A penumbral lunar eclipse on Friday, 15 June 1973. * A total solar eclipse on Saturday, 30 June 1973. * A penumbral lunar eclipse on Sunday, 15 July 1973. * A partial lunar eclipse on Monday, 10 December 1973. * An annular solar eclipse on Monday, 24 December 1973.

Solar eclipses of 1971–1974

Saros 131

Metonic series

Notess

References

1973 1 4 1973 in science 1973 1 4 January 1973 events {{Solar-eclipse-stub