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This artist's concept shows one of NASA's Voyager spacecraft entering interstellar space, or the space between stars. This region is dominated by plasma ejected by the death of giant stars millions of years ago. Hotter, sparser plasma fills the environment inside our solar bubble.

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(B) An artist's illustration of the Wind spacecraft, which launched 25 years ago in 1994.

(C) NASA missions continue to use Faraday cups to study the solar wind, much like the Solar Wind Experiment from Wind that launched in 1994, on the left. On the right is the Parker Solar Cup aboard Parker Solar Probe, which launched in 2018.

Driving into the future

Entangled among the galaxies in this Hubble image are mysterious-looking arcs of blue light. These are actually distorted images of remote galaxies behind the cluster. The collective gravity of all the normal and dark matter trapped inside the cluster warps space-time and affects light traveling through the cluster toward Earth.

This infrared image from NASA's Spitzer Space telescope shows a cloud of gas and dust carved out by a massive star. A drawing overlaid on the image reveals why researchers nicknamed this region the "Jack-o'-lantern Nebula."

Copernicus Sentinel-1 over Typhoon Hagibis

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Hubble Sees a Familiar Sight

Sonoma County Kincaid Fire Races Through 20,000 Acres in Two Days