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Title: Light from fires that were lit at the time of the Battle of Hastings in England in 1066 A.D. has ... Post by: staedtler on Mar 16, 2017 Light from fires that were lit at the time of the Battle of Hastings in England in 1066 A.D. has traveled out into space at the speed of light. How far out into space has this light now reached, compared to the distances to the 20 brightest stars (see Appendix, Table A-5, Comins and Kaufmann, Discovering the Universe, 7th Ed.)?
A) Beyond Sirius, but not beyond Betelgeuse, Rigel, and Deneb B) Beyond Sirius, Betelgeuse and Rigel, but not beyond Deneb C) Beyond Sirius and Betelgeuse, but not beyond Rigel and Deneb D) Beyond Sirius, Betelgeuse, Rigel and Deneb Title: Re: Light from fires that were lit at the time of the Battle of Hastings in England in 1066 A.D. has ... Post by: papachulo on Mar 16, 2017 Content hidden
Title: Re: Light from fires that were lit at the time of the Battle of Hastings in England in 1066 A.D. has ... Post by: staedtler on May 1, 2017 :raised_hands:
Correct :) |