'In 1611 Johannes Kepler introduced a second convex lens, giving this instrument greater power'
a telescope
SCIENCE & TECHNOLOGY: In 1611 Johannes Kepler introduced a second convex lens, giving this instrument greater power
In 1611 Johannes Kepler introduced a second convex lens, giving this instrument greater power
In 1611 Johannes Kepler introduced a second convex lens, giving this instrument greater power
SCIENCE & TECHNOLOGY
a telescope
SCIENCE & TECHNOLOGY