... The yardangs are not barsoomian warriors in a newly discovered Edgar Rice Burroughs tale of adventure and conquest on the Red Planet. ... Strewn throughout the universe are "trees" of hydrogen gas that absorb light from distant objects. ... The Cosmic X-Ray Background . ... With brilliant Venus above the western horizon at sunset and Jupiter and Saturn high in the east by early evening, November's night sky is filled with bright planets. ... Jupiter Swallows Comet Shoemaker Levy 9 . ...