Examlex
When helium fusion begins in a one solar mass main star, it begins gradually, with this rateslowly increasing over time.
Mercury
A heavy, silvery d-block element, also known as quicksilver, that is liquid at room temperature and used in thermometers, barometers, and batteries.
Elemental Symbol
A one- or two-letter abbreviation that represents a chemical element (e.g., H for hydrogen, O for oxygen).
Potassium
A soft, silvery-white metallic element, symbol K, with atomic number 19, essential for many biological functions and used in various industrial applications.
Elemental Symbol
A letter or combination of letters representing a chemical element in the periodic table.
Q12: Quasars usually have their distances measured by
Q14: A cold region of dust which scatters
Q22: Unlike the ultraviolet photons originally emitted by
Q25: The core of the Milky Way, Sagittarius
Q42: The Sun is a fairly normal star.
Q42: The polarization of light passing though the
Q45: In eclipsing binaries, in contrast to spectroscopic
Q64: If successive generations of stars return material
Q75: Every red dwarf star that ever joined
Q96: When mass is accreted into a black