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Interstellar Insights

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Second planet from the Sun

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Vertical Clues

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Fourth planet from the Sun
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Brightest moon of Saturn
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Outer space boundary
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Dwarf planet in the asteroid belt
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Messenger of the gods; closest planet to the Sun
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One billion years in astronomy
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NASA’s Mars rover launched in 2020
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First human to walk on the Moon
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Effect caused by an object moving in curved spacetime
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Type of celestial body that orbits a star
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Dark patches on the Moon

Horizontal Clues

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Second planet from the Sun
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First US astronaut to orbit Earth
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NASA’s famous telescope launched in 1990
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Our home galaxy
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Largest moon of Neptune
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Modern constellation symbolized by a hunter
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Largest gas giant
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Einstein’s general theory of...
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Largest volcano in the solar system
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Interstellar cloud of dust and gas
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Imaginary line that Earth spins around