technetium-star | space-encyclopedia

Space Travel

23, May, 2012

Space exploration began with the launch of Sputnik and Astrophysics was born as the application of physics to the phenomena observed by Astronomy, which etymologically means laws of the stars.

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Term	Definition
Technetium Star	technetium star A star whose spectrum shows the presence of the unstable element technetium. The longest-lived isotope of technetium has a half-life of 2.1 × 10 to the power of 9 years, which is short in relation to the typical lifetimes of stars. The age of the Sun, for example is 5 × 10 to the power of 9 years. The implication is that the technetium is being created within the star itself and subsequently brought to the surface; it could not have been in the material from which the star formed. Technetium has been detected only in a small group of carbon stars.

Term

Definition

Technetium Star

technetium star A star whose spectrum shows the presence of the unstable element technetium. The longest-lived isotope of technetium has a half-life of 2.1 × 10 to the power of 9 years, which is short in relation to the typical lifetimes of stars. The age of the Sun, for example is 5 × 10 to the power of 9 years. The implication is that the technetium is being created within the star itself and subsequently brought to the surface; it could not have been in the material from which the star formed. Technetium has been detected only in a small group of carbon stars.