Hint
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Answer
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Highly magnetized rotating neutron star that emits a beam of electromagnetic radiation.
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Pulsar
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Spiral galaxy approximately 2.5 million light-years from the Milky Way. In the future may form a giant galaxy with the Milky Way.
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Andromeda
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Geometric theory of gravitation published by Albert Einstein in 1916.
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General Relativity
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Jupiter's moon hypothesized to have a water ocean beneath its surface that could support life.
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Europa
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The most common element on Earth, forming much of its core.
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Iron
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Which conic section is the shape of a planetary orbit?
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Ellipse
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Type of stellar remnant that can exist for trillions of years and will be the fate of the Sun.
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White dwarf
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Satellite of Jupiter and the largest moon in the Solar System. May have layered oceans beneath its surface.
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Ganymede
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Type of matter hypothesized to account for 27% of the total mass–energy of the known universe.
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Dark matter
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Particle physics theory concerning the electromagnetic, weak, and strong interactions of the known subatomic particles.
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Standard Model
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Subatomic particle with no electric charge and with a mean lifetime of 15 minutes (when free).
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Neutron
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Hypothetical topological feature of spacetime that would fundamentally be a "shortcut" through spacetime.
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Wormhole
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Electrically neutral, weakly interacting elementary subatomic particle.
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Neutrino
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Ripples in the curvature of spacetime that propagate as a wave.
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Gravitational waves
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The force carrier for the electromagnetic interaction.
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Photon
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Boundary around a black hole beyond which events inside it cannot affect an outside observer.
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Event Horizon
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Which planet is about 2.3 light-minutes distance from earth?
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Venus
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Natural science conducted in order to understand how the universe behaves.
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physics
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Extremely luminous burst of radiation of a dying massive star.
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Supernova
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Mathematical term in the Einstein equations for general relativity that accounts for a expanding universe. It is the value of the energy density of the vacuum of space.
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Cosmological constant
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The most energetic and distant members of a class of objects called active galactic nuclei.
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Quasar
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Astronomer known for showing that the recessional velocity of a galaxy increases with its distance from the earth, implying the universe is expanding.
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Edwin Hubble
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Unit of energy, work, or amount of heat in the International System of Units, with symbol J.
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Joule
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Red supergiant of the constellation of Orion that is predicted to explode in a supernova in the near future.
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Betelgeuse
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Extremely high frequency electromagnetic radiation.
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Gamma ray
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Nuclear reaction in which two or more atomic nuclei collide at a very high energy and join to form a new type of atomic nucleus.
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Nuclear Fusion
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Subatomic particle with a positive electric charge and composed of 2 up quarks and 1 down quark.
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Proton
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Theoretical framework in which the point-like particles of particle physics are replaced by one-dimensional objects called strings.
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String theory
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Planet whose mass is 2.5 times that of all the other planets in the Solar System combined.
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Jupiter
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Elementary particle responsible for the mechanism that gives mass to some other fundamental particles.
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Higgs boson
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The third-most abundant element in the universe.
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Oxygen
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As of 2014 is the largest and most complex experimental facilitiy ever built.
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Large Hadron Collider
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Physical constant that is the quantum of action in quantum mechanics.
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Planck constant
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What is the wavelength of the cosmic background radiation?
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Microwave
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Which planet as an orbital period of about 88 Earth days?
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Mercury
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Radiation that is predicted to be released by black holes, due to quantum effects near the event horizon.
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Hawking radiation
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A measure of a thermodynamic system's disorder, or a measure of progressing towards thermodynamic equilibrium.
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Entropy
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Elementary particles that combine to form composite particles called hadrons, the most stable of which are protons and neutrons.
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Quarks
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English physicist and mathematician who is widely recognised as the most influential scientist of all time and as a key figure in the scientific revolution.
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Isaac Newton
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