They’re small-sometimes no more voluminous than a gas giant planet-and low in mass and temperature (for a star).

Red dwarf stars, also called M-dwarfs, are thought to be the most common type of star in the universe. Blue DwarfĪn image of the sun taken with the Extreme Ultraviolet Imager aboard STEREO-A, which collects images in several wavelengths of light that are invisible to the human eye, colorized in blue. Here are four stars that may exist someday-if the universe survives long enough to birth them. Some of these objects may even serve as harbingers of the heat death of the universe, after which, it is impossible to know. In the far-flung future, many billions or even trillions of years from now, weird objects could arise as advanced stages of our present stars morph into entirely new celestial objects. But the stars of today’s cosmos aren’t the only types of stars that will ever exist. More than 13 billion years later, the matter of the universe has settled into many types of stars of varying sizes, brightnesses and life spans. And short-lived stars made of nothing but hydrogen and helium may have flashed in and out of existence like sparks in the night. Pseudo-galaxies lit up a sea of neutral hydrogen to make the universe transparent, releasing photons where before there was nothing but darkness. Shortly after the Big Bang, large clouds of material may have formed black holes directly, without first coalescing into stars as we see today. The early universe was filled with strange and mysterious objects.

Smallest main sequence star