"solar spots"

Key Phrases: Divine Being, Great Britain, Sir John Herschel, New Holland, Philosophical Transactions, Cape of Good Hope, feet achromatic, cubical miles, enlightened hemisphere, concave eyeglass, moderate magnifying power, feet reflecting telescope (see more)

Key Phrases: Divine Being, Great Britain, Sir John Herschel, New Holland, Philosophical Transactions, Cape of Good Hope, United States, Earl of Rosse, Lord God Almighty, North America, Cor Caroli, Divine Providence, Sir William Herschel, Ursa Major, Mount Etna, New York, Canis Minor, Edinburgh Philosophical Journal, Jesus Christ, Ras Algethi, Ras Alhague, Canis Major, Captain Kater, New Guinea, Northern Crown, feet achromatic, cubical miles, enlightened hemisphere, concave eyeglass, moderate magnifying power, feet reflecting telescope, matic telescope, enlightened surface, superior conjunction with the sun, feet reflector, ruddy aspect, terrestrial eyepiece, astronomical eyepiece, concave speculum, inch focal distance, great speculum, large speculum, mean apparent diameter, starry groups, inch achromatic, celestial scenery, diagonal eyepiece, nitrous oxyde, greatest elongation from the sun, same magnifying power (see less)

Key Phrases: Divine Being, Great Britain, Sir John Herschel, Philosophical Transactions, New Holland, Cape of Good Hope, full enlightened hemisphere, cubical miles, feet achromatic, declination semicircle, astronomical tyro, meridian about midnight (see more)

Key Phrases: Divine Being, Great Britain, Sir John Herschel, Philosophical Transactions, New Holland, Cape of Good Hope, United States, Earl of Rosse, North America, Divine Providence, Lord God Almighty, Cor Caroli, Mount Etna, Ursa Major, Sir William Herschel, New York, Edinburgh Philosophical Journal, Sir Isaac Newton, Canis Minor, Jesus Christ, Ras Algethi, Ras Alhague, Ursa Minor, Corona Borealis, New Guinea, full enlightened hemisphere, cubical miles, feet achromatic, declination semicircle, astronomical tyro, meridian about midnight, such august objects, concave eyeglass, sublunary system, astronomical eyepiece, moderate magnifying power, superior conjunction with the sun, thousand miles every hour, mottled nebulosity, perpendicular bight, terrestrial eyepiece, good achromatic telescope, been burst asunder, enlightened surface, feet reflecting telescope, feet reflector, large speculum, inch focal distance, other planetary worlds, mean apparent diameter (see less)

Key Phrases: Walter Maunder, Royal Observatory, North Atlantic, New England, Royal Society, North America, magnetic calm, prolonged sunspot minimum, solar minima, solar science, solar magnetism, women astronomers (see more)

Key Phrases: Walter Maunder, Royal Observatory, North Atlantic, New England, Royal Society, North America, Royal Astronomical Society, Lord Kelvin, Annie Maunder, New York, Astrophysical Journal, Dalton Minimum, Jean Grove, Edmund Halley, Stephen Gray, World War, Agnes Clerke, American Geophysical Union, Sydney Chapman, British Astronomical Association, Greenwich Observatory, Oxford University Press, Scientific American, Cambridge University Press, Irish Astronomical Journal, magnetic calm, prolonged sunspot minimum, solar minima, solar science, solar magnetism, women astronomers, butterfly diagram, solar hemisphere, poloidal field, solar spots, geomagnetic storms, solar stars, solar astronomer, solar structure, solar wind plasma, solar equator, coronal holes, solar activity cycle, toroidal field, solar eruptions, solar variability, magnetic disturbances, medieval warm period, outstanding difficulty, convective zone (see less)

Key Phrases: British Association, Mauna Loa, Northern Zone, Professor Perrey, Milky Way, Professor Kirchhoff, cosmical repulsion, cosmical masses, cosmical developments, antithetic forces, cosmical motion, molecular repulsion (see more)

Key Phrases: British Association, Mauna Loa, Northern Zone, Professor Perrey, Milky Way, Professor Kirchhoff, Alexis Perrey, Basin of the Danube, Basin of the Rhone, Relative Frequency, Both Zones, Corona Borealis, cosmical repulsion, cosmical masses, cosmical developments, antithetic forces, cosmical motion, molecular repulsion, other secondary forces, celestial masses, cosmical forces, cosmical physics, cosmical bodies, cosmical phenomena, spongy platinum, solar action, solar globe, vis inertice, eruptive phenomena, seismic phenomena, celestial dynamics, terrestrial light, cosmic repulsion, molecular conditions, solar spots, cosmic masses, numerical laws (see less)