Simeis 147 (Spaghetti Nebula, or Sharpless 2-240) is a large supernova remnant in the constellations of Taurus and Auriga. It's a result of supernova explosion about 40 000 years ago. This nebula covers about 3° and is approximately 3000 light years away which means that the real size is about 140 light years. Picture by Emil Ivanov
A beautiful new image of two colliding galaxies has been released by NASA's Great Observatories. The Antennae galaxies, located about 62 million light-years from Earth, are shown in this composite image from the Chandra X-ray Observatory (blue), the Hubble Space Telescope (gold and brown), and the Spitzer Space Telescope (red).
Massive star IRS 4 is beginning to spread its wings. Born about 100,000 years ago, material streaming out from this newborn star has formed the nebula dubbed Sharpless 2-106 Nebula (S106), pictured above. It lies about 2000 light-years away toward the constellation of the Swan (Cygnus).
Methuselah Nebula MWP1: Beautiful Methuseleh, in the constellation Cygnus, is a mere 150 thousand years old, a cosmic blink of the eye but far older than the average nebula which lasts 10 - 20 thousand years. (Planetary nebulae are the brief final phase of stellar evolution as the central star shrugs off its outer layers to become a hot white dwarf.)
Witch's Broom Nebula: The Witch's Broom Nebula is also part of the famous Veil Nebula complex, this being the western portion. The entire complex is the remnant of a powerful supernova explosion which occurred thousands of years ago, sending elements forged in the destroyed stars core into space. The bright star is 52 Cygni.