An astronaut in a white spacesuit kneels in simulated lunar soil while working with scientific equipment in a large testing facility. Staff members and support structures are visible in the background. - 晨昏线航天

An astronaut in a white spacesuit kneels in simulated lunar soil while working with scientific equipment in a large testing facility. Staff members and support structures are visible in the background. — An astronaut in a white spacesuit kneels in simulated lunar soil while working with scientific equipment in a large testing facility. Staff members and support structures are visible in the background. 图：NASA · NASA Image and Media Guidelines

署名图：NASA

许可证NASA Image and Media Guidelines

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An astronaut in a white spacesuit kneels in simulated lunar soil while working with scientific equipment in a large testing facility. Staff members and support structures are visible in the background.

A series of V-shaped wave clouds appears over an ocean filled with pieces of sea ice.

An astronaut in a white spacesuit kneels in simulated lunar soil while working with scientific equipment in a large testing facility. Staff members and support structures are visible in the background.

A series of V-shaped wave clouds appears over an ocean filled with pieces of sea ice.

A technician in a white clean-room suit and blue gloves uses a small flashlight to inspect a spacecraft instrument inside a dark testing chamber. Colorful wires and metallic components surround the instrument.

A small ice- and snow-covered island with an active volcanic crater at its center is surrounded by drifting pieces of sea ice. A thermal signal and small plume appear in the crater, and ash darkens the snow on the volcano’s northern slopes.

An astronaut in a white spacesuit kneels in simulated lunar soil while working with scientific equipment in a large testing facility. Staff members and support structures are visible in the background.

An astronaut in a white spacesuit kneels in simulated lunar soil while working with scientific equipment in a large testing facility. Staff members and support structures are visible in the background.

Thick gray plumes of smoke stream from large numbers of fires scattered across the island of Borneo.

NASA's Nancy Grace Roman Space Telescope will survey vast swaths of sky during its five-year primary mission. During that time, scientists expect it to see an incredible number of new objects, including stars, galaxies, black holes and planets outside our solar system, known as exoplanets. This infographic previews some of the discoveries scientists anticipate from Roman's data deluge. Image: NASA's Goddard Space Flight Center/ Scott Wiessinger (eMITS)/Ashley Balzer (eMITS)/Julia Shepherd (Inter

图：popsci.com

An astronaut in a white spacesuit kneels in simulated lunar soil while working with scientific equipment in a large testing facility. Staff members and support structures are visible in the background.

Ice in a broad Alpine basin connects with a short, narrow stretch of glacial ice in the valley below through one small icefall. Lakes fill much of the valley beyond the glacier’s terminus.