NASA’s real-time science encyclopedia of deep space exploration. Our scientists and far-ranging robots explore the wild frontiers of our solar system.

Oct 21, 2025 · VERITAS will unlock the secrets of Venus’ surface and interior evolution by searching for evidence of past and present water, providing an inventory of current and recent volcanic and …

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The Venus Exploration Assessment Group (VEXAG) established a set of Goals, Objectives and Investigations (GOI) for Venus Exploration (VEXAG, GOI, 2016) that provided this study with a …

Of the terrestrial (rocky) planets of the inner solar system, neither Mercury nor Venus have any moons at all, Earth has one and Mars has its two small moons. In the outer solar system, the gas giants Jupiter …

Oct 21, 2025 · SURFACE AREA The outer or uppermost part of a planet, moon, asteroid, comet or other body. 55,742,106 square miles 196,936,994 square miles

Oct 21, 2025 · Planets About Planets PLANETS Mercury Venus Earth Mars Jupiter Saturn Uranus Neptune DWARF PLANETS Pluto Ceres Makemake Haumea Eris HYPOTHETICAL

At that time, April 10, 837, Halley reached a total apparent brightness of about magnitude -3.5, nearly that of Venus at greatest brilliance. The light of Halley was spread over an extended area, however, …

Images from the two Voyagers revealed a surface brighter than that of Earth's moon, crisscrossed with numerous bands and ridges, and with a surprising lack of large impact craters, tall cliffs, or mountains.

Although we call it the surface, the photosphere is actually the first layer of the solar atmosphere. It's about 250 miles thick, with temperatures reaching about 10,000 degrees Fahrenheit (5,500 degrees …