In addition, Stardust carried an equally important payload on the opposite side of the cometary collector: the first samples of contemporary interstellar dust ever collected.
Starlight bounces off a normally dark, interstellar core cloud (center) inside a larger cloud called L183 in a short-infrared-wavelength Spitzer Space Telescope image released on September 24.
Satellites that orbit close to major galaxies eventually forfeit their interstellar gas to the greater galaxy.
In hyperspace, there is no limit to how fast a starship can travel, and thus interstellar distances can be traversed in mere minutes.
Most galaxies abound with interstellar gas and dust, the detritus of countless generations of stars.
A classic dark nebula, the Snake is a tendril of interstellar gas and dust about 650 light years away.
A nebula an interstellar cloud of dust, hydrogen gas, helium gas and plasma.
Known by the popular name of the Dumbbell Nebula, the beautifully symmetric interstellar gas cloud is over 2.5 light-years across and about 1, 200 light-years away in the constellation Vulpecula.
My conclusions are that the 'safe bet' for predicting when the first interstellar mission will occur will always lie hundreds of years into the future.
If we were to exclude speculative methods of propulsion such as warp drives, we find a rich landscape of promising ideas that may play a crucial role in interstellar travel.
Elliptical galaxies contain many older stars, up to one trillion, but little dust and other interstellar matter.
But for other astronomers, interstellar dust is useful in its own right.
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