Measuring star positions, illustration. The device being used here, variously known as a cross-staff or a Jacob's staff, is used in astronomy to measure the position of a star in the sky. This is determined by the angle it makes with the horizon (green arrow).

px px dpi = cm x cm = MB
Details

Creative#:

TOP26514152

Source:

達志影像

Authorization Type:

RM

Release Information:

須由TPG 完整授權

Model Release:

N/A

Property Release:

N/A

Right to Privacy:

No

Same folder images:

Same folder images