Examlex
Open clusters are older than globular clusters.
Oxygen
A chemical element with symbol O, essential for most life forms on Earth, crucial for cellular respiration in animals.
Nutrients
Substances obtained from food and used by our bodies to promote growth, maintenance, and repair.
Atrioventricular Valve
Heart valve located between an atrium and a ventricle.
Pulmonary Semilunar Valve
A valve in the heart located between the right ventricle and the pulmonary artery that prevents backflow of blood into the heart during ventricular relaxation.
Q8: The _ of a radio telescope collects
Q12: The photons coming from blackbody radiation create
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Q33: Nuclear fusion within the Sun proceeds step-by-step
Q33: Stellar winds and _ will eventually blow
Q39: The interstellar medium is composed of mainly
Q61: The amount of energy needed to move
Q62: The formula <span class="ql-formula"
Q67: When mapping the interior of the Sun,
Q104: When they were first discovered, quasars appeared