Planetary nebulas are made by dying stars about the size of our sun. One of the most famous is called the Helix or Eye of God Nebula, officially NGC7293. It is about three light years across and ...

The nebula will dissipate in about 15,000 years, a relative blink of the eye in cosmological terms. At that point, the white dwarf will be all that remains of the former solar system (unless that ...

One X user, whose post had amassed more than 800,000 views as of this writing, shared the picture (archived) on Nov. 21 along with the caption: "The Helix Nebula captured by NASA'S Hubble space ...