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When a star consumes all of the energy it can from hydrogen fusion in its core, the next long-term energy-producing phase is
Segregation
The enforced separation of different racial groups in a country, community, or establishment, often marked by discriminatory laws and practices.
Civil Rights Movement
A struggle for social justice in the United States during the 1950s and 1960s, aimed at ending racial segregation and discrimination against African Americans.
Liberal-Left Coalition
A political alignment that brings together liberal and left-wing groups or parties to pursue common goals or policies, often in opposition to conservative or right-wing agendas.
Postwar Period
The era immediately following the end of a major conflict, often marked by societal changes and reconstruction efforts.
Q25: What is the "transition zone"?<br>A) This is
Q100: An old high-mass star can have a
Q135: To what extent do spicules cover the
Q152: The star <span class="ql-formula" data-value="\alpha"><span
Q154: Two stars, one classified A4 V and
Q155: If astronomers measure the parallax of a
Q176: The 2004 discovery of two pulsars in
Q207: What is the lifetime of a typical
Q212: As one moves upward and to the
Q224: Can astronomers observe nebulae, the regions where