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How Negative Thermal Expansion Alloys Are Reshaping Telescope Stability for Exoplanet Discovery
When the search for habitable exoplanets requires a 1,000 times more stable telescope than James Webb Space Telescope, even minimal material expansion down to a fraction of the width of an atom is the ...
Most materials expand when heated. A few, such as water just above freezing, contract. Now, for the first time, physicists have found a material that switches from expanding to contracting in the ...
Most materials expand when they are heated, but some contract instead. A record value of this effect — known as negative thermal expansion — has now been observed in magnetic nanocrystals. Controlling ...
Materials expand when heated and contract when cooled because of temperature-induced changes in distances between molecules and atoms. Thermal expansion does not change overall structure of the ...
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