... Curiosity Before Mars: Seven Minutes of Terror . ... Ash and Lightning Above an Icelandic Volcano . ... Although the large ash plume was not unparalleled in its abundance, its location was particularly noticeable because it drifted across such well-populated areas. Star Cluster R136 Bursts Out . ... Popularly called the Tulip Nebula the glowing cloud of interstellar gas and dust is also found in the 1959 catalog by astronomer Stewart Sharpless as Sh2-101. ... How fast is lightning? ...