query: Looking at Earth's history using a cosmic mirror
positive_passages.docid: 143419
positive_passages.text: A mirror in the sky to look at past Earth
negative_passages.docid: 36381
negative_passages.text: earth; the earth
negative_passages.docid: 96657
negative_passages.text: The speed of light as it approaches a massive body
negative_passages.docid: 63570
negative_passages.text: Test to see what population an observation came from
negative_passages.docid: 67858
negative_passages.text: Viewing glass from an oblique angle
negative_passages.docid: 64070
negative_passages.text: sample space and observational units
negative_passages.docid: 145892
negative_passages.text: How accurate is approximating the Earth as a sphere?
negative_passages.docid: 112408
negative_passages.text: What is the theoretical limit for farthest we can see back in time and distance?
negative_passages.docid: 143065
negative_passages.text: Fine Tuned Universe
negative_passages.docid: 65566
negative_passages.text: Estimating age of the universe by Hubble's law?
negative_passages.docid: 95521
negative_passages.text: Since there are gravitational lenses, are there gravitational mirrors?
negative_passages.docid: 44525
negative_passages.text: Chosing a reference frame in which the Earth is at rest and doesn't rotate
negative_passages.docid: 43480
negative_passages.text: Visualizing the 4th dimension.
negative_passages.docid: 58042
negative_passages.text: Redshifting of Light and the expansion of the universe
negative_passages.docid: 85419
negative_passages.text: Will the Earth ever show synchronous rotation? Why and when?
negative_passages.docid: 41750
negative_passages.text: The age of the universe
negative_passages.docid: 110960
negative_passages.text: ID a book about a mirror world and 4th dimension