Errata Sheet for Exploring the Universe: A Laboratory Guide for Astronomy
On page 17, the last paragraph on the page states: “Concave lenses of all types (plano-concave,
double concave, or negative meniscus) cause light rays to converge, or pinch inward. Convex
lenses (plano-convex, double convex, or positive meniscus) cause light to diverge, or spread
out.”
The line should read that “Concave lenses of all types … cause light rays to diverge … Convex
lenses … cause light to converge …”
On page 20, the proportion should read:
𝐿𝐺𝑃 ⍺ 𝐴 ⍺ 𝐷2
On pages 257, 258, and 262, the equation referenced should be:
4𝜋 2 ∙ 𝑎3 2 1
𝑣 = √(
)( − )
𝒑𝟐
𝑟 𝑎
On page 258, the last line of text should read:
k = a constant, referred to as Kepler’s constant
On page 259, the line after “Rearranging to solve for k, Kepler’s constant:” should read:
(150,000,000)3
3,375,000,000,000,000,000,000,000
𝑘=
=
2
(365)
133,225
Solving for k:
3
𝑘=
3,375,000,000,000,000,000,000,000
𝑘𝑚
= 2.53331 𝑥 1019
2
133,225
𝑑𝑎𝑦