Red and brown dwarfs are smaller and cooler than our Sun and do not shine brightly.

红矮星和褐矮星比我们的太阳更小、更冷，且不会发出明亮的光芒。

youdao

Remarkably, brown dwarfs are roughly the size of the planet Jupiter.

值得注意的是，褐矮星的大小却和木星相当。

youdao

Hundreds of possible brown dwarfs are out there awaiting confirmation.

成百上千个褐矮星仍等待着确认身份。

youdao

MACHOs could well be white dwarfs--overturning a common belief that the dark matter would consist mainly of lighter interstellar garbage such as brown dwarfs.

ECONOMIST: The dark side of cosmology

The first kind, the chunks, could be anything in size from dust grains, up through rocks and asteroids, to brown dwarfs (condensed lumps of gas not quite heavy enough to be stars).

ECONOMIST: The dark side of cosmology

The problem is that brown dwarfs have been discovered orbiting other stars, and it is thought that planets can sometimes be ejected from their natal solar systems as a result of gravitational interactions, and may thus be found drifting in space.

ECONOMIST: Twinkle, twinkle, giant planet