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science12h ago
'Scars' in the cosmos Left From the Early Universe Could Enable Us to Travel Through Time
- Latest data from pulsar timing arrays fuels renewed interest in cosmic strings as a source of nanohertz gravitational waves.
- Some models suggest cosmic strings could produce signals compatible with gravitational waves detected by NANOGrav.
- The idea includes one-dimensional topological defects, called cosmic strings, possibly spanning vast distances across the cosmos.
- Closed time-like curves from moving cosmic strings are discussed as a theoretical possibility within Einstein’s equations.
- Cosmic superstrings from string theory could connect observations to broader theories if detected.
- No cosmic string has been observed directly; researchers rely on signals inferred from pulsar timing and gravitational wave backgrounds.
- Future missions like LISA, planned for 2034, may help differentiate between cosmic string scenarios and black hole sources.
- Researchers stress the distinction between theoretical possibilities and practical time-travel feasibility.
- Researchers continue to test models against frequency ranges, amplitude patterns, and polarization signatures.
- The Daily Galaxy frames the discussion as an ongoing scientific exploration with cautious optimism.
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