Asteroid Belt Symbol Roman

Ceres, the only object in the asteroid belt large enough to be called a dwarf planet, is about 950 km in diameter, whereas Vesta, Pallas, and Hygiea have mean diameters of less than 600 km. The remaining bodies range down to the size of a dust particle. The asteroid material is so thinly distributed that numerous unmanned spacecraft have traversed it without incident. Nonetheless, collisions...

Solar System Mars Up Close

The Solar System formed 4. 6 billion years ago from the gravitational collapse of a giant interstellar molecular cloud. The vast majority of the system's mass is in the Sun, with the majority of the remaining mass contained in Jupiter. The four smaller inner planets, Mercury, Venus, Earth and Mars, are terrestrial planets, being primarily composed of rock and metal. The four outer planets are...

Outer Space Posters NASA

Outer space, or simply space, is the expanse that exists beyond the Earth and between celestial bodies. Outer space is not completely empty—it is a hard vacuum containing a low density of particles, predominantly a plasma of hydrogen and helium, as well as electromagnetic radiation, magnetic fields, neutrinos, dust, and cosmic rays. The baseline temperature of outer space, as set by the...

The Three Possible Shapes of Galaxies

Some textual scholars regard the passages referring to The Three and The Thirty as having come from either a source distinct to the main sources in the Books of Samuel, or being otherwise out of place. Since parts of the text have distinct stylistic differences from other portions—appearing as a list, as a series of character introductions, or as a flowing narrative—Some suspect that the...
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