Before point return (5 resultados)

Condición: Good. Former library copy. Pages intact with minimal writing/highlighting. The binding may be loose and creased. Dust jackets/supplements are not included. Includes library markings. Stock photo provided. Product includes identifying sticker. Better World Books: Buy Books. Do Good.

Soft cover. Condición: Good. PB/pub.1986/Gd. condition/146 pages - An exchange of views on the cold war. The Reagan doctrine and what is to come. [TH532726]. Book.

Soft cover. Condición: Good. PB/pub.1986/VG condition/146 pages - An exchange of views on the cold war, the Reagan Doctrine, and what is to come. An effort to help rethink the embedded propositions which underlie the cold war con text and dictate the continuation of this situat ion. [KA612028]. Book. …

Taschenbuch. Condición: Neu. Neuware - How far could you travel before turning around was no longer enough to bring you home The ship's clock measures years. Earth's comparison clock races through millions-and then billions. No wall blocks the way. No alarm announces the danger. Somewhere along the chosen route lies an invisible, model-dependent limit after which this return plan can no longer reach Earth in finite time. BEYOND THE MILKY WAY continues the same cinematic voyage beyond our galaxy's bright stellar disk and into the immense structures of the universe. Cross Andromeda's extended halo, enter the crowded Virgo Cluster, trace the reconstructed flow of Laniakea, and uncover the filaments and voids of the cosmic web. Along the way, discover why much of the universe must be mapped through gravity, motion, hot gas, and bent light rather than ordinary photographs. As the ship accelerates, the forward sky becomes both stranger and more dangerous. Ancient background radiation shifts toward higher energy. Sparse gas and dust strike with extraordinary force. Cosmic expansion changes which signals, destinations, and return paths remain possible. Then three almost-identical return choices reveal the central mystery: one path reaches home after an immense wait, one approaches home only as time tends toward infinity, and one never returns. The boundary belongs to the route and model-not to one universal distance painted across space. Every panorama opens a curiosity gap. Every instrument uncovers another clue. Every spread carries the same silent ship closer to a decision that cannot be seen from the window. STEM Learning Experience Beyond the Milky Way supports STEM learning by helping readers: - Compare galaxies, galaxy groups, clusters, superclusters, filaments, and voids.- Explore how dark matter is inferred from gravity and gravitational lensing.- Distinguish the Local Group, Virgo Cluster, Laniakea, and the wider cosmic web.- Compare ship time with the much longer time measured from Earth.- Understand the difference between cosmic expansion and motion through space.- Explore redshift, blueshift, the cosmic microwave background, and relativistic hazards.- Read worldlines and simplified spacetime diagrams as maps of possible journeys.- Distinguish a Hubble radius, cosmological event horizon, and path-specific last-return event.- Evaluate which scenes are observations, reconstructions, models, simplifications, or fictional devices.Designed for ages 8-12 and families ready to discover that the universe can contain real boundaries without drawing visible lines.…

Condición: New. Print on Demand.