first contact

References

first contact

astronomy

Written by

The Information Architects of Encyclopaedia Britannica

Learn about this topic in these articles:

eclipse
Solar eclipse phenomena
The designation “first contact” refers to the moment when the disk of the Moon, invisible against the bright sky background, first touches the disk of the Sun. The partial phase of the eclipse then begins as a small indentation in the western rim of the Sun becomes…
Read More
The designation “first contact” refers to the moment when the disk of the Moon, invisible against the bright sky background, first touches the disk of the Sun. The partial phase of the eclipse then begins as a small indentation in the western rim of the Sun becomes…
Read More