Astronomy classes in high schools and colleges usually pay attention when there is a lunar eclipse, plus a few scientists who want to renew their memories of the image. But this coming week’s eclipse, the first of a rare “tetrad,” a series of four blood moons on Jewish holidays this year and next, is getting a lot more attention. As in the author of “Blood Moons: Decoding the Imminent Heavenly Signs,” Pastor Mark Biltz, appearing on the Today Show on Monday to talk about the phenomenon. Some consider it nothing more than an alignment of the heavens, but others are watching much more closely, because of the alignment with biblical prophecy. “We are on the verge of witnessing something historic,” said Biltz, who discovered the blood moons phenomenon in 2007. A report from details just which regions of the United States will have the best view of this astronomical phenomenon beginning at 12:53 a.m. on the Tuesday, April 15. More