The term Planetary Nebula is one type of Nebulae (Not nebulas), which are large clouds of ice and dust that have been created in the aftermath of the death of a star. Although their name includes “planet”, they are nothing to do with planets. They do get their name from the mistaken...
It is theorized that theSolar Systemwas created from a nebula billions of years ago. TheUniverseis 13.8 billion years old, and the generally accepted view is thatthe Sunand the Solar System is only 5 billion years give or take. What was happening in the eight billion years between the star...
There are currently 88 officially recognized constellations in total, which together cover the entire sky. Hence, any given point in a celestial coordinate system can unambiguously be assigned to a constellation. It is also a common practice in modern astronomy, when locating objects in the sky, ...