If you have not received your copy of The Daily Iowan by 7:30 a. m., please call 4191 before 10:30 a. m. and the Iowan will be delivered to your hoine. at owan Cloudy and colder today. Occasional snow. Tomorrow partly cloudy and colder. High today 38i low tonight near 15. Yesterday's hi h 39; low 13 . r.t. 1868 AP Leased Wire. AP Wirephoto. UP Leased WIre Five Centa Iowa City. Iowa. Sunday. Mar...

Looking up, it’s easy to spot the clouds. The white fluff is strikingly contrasted by the blue sky. It’s not so easy from space, especially above the Earth’s poles. The clouds blend in against the vast expanses of snow and ice. This is a problem for scientists who use satellites to study clouds and climate. Recently though, UC Berkeley statistician Bin Yu, her graduate student Tao Shi, and thei...

The topic of this paper is the sensitivity of the brightness of noctilucent clouds (NLC) on the ambient water vapour mixing ratio f(H2O). Firstly, we use state-of-the-art models of NLC layer formation to predict NLC brightness changes in response to changes in the 80 km mixing ratio f(H2O) for the two cases of ground-based 532 nm lidar observations at 69 N and for hemispheric satellite SBUV obs...

We present five X-ray quasars behind the Small Magellanic Cloud, increasing the number of known quasars behind the SMC by ∼40%. They were identified via follow-up spectroscopy of serendipitous sources from the Chandra X-ray Observatory matched with objects from the OGLE database. All quasars lie behind dense parts of the SMC, and could be very useful for proper motion studies. We analyze X-ray ...