Final answer:
Scirus is a specialized search engine ideal for scientific topics, making it well-suited for researching advances in solar panel construction.
Step-by-step explanation:
Scirus would be the best choice of search engine for researching advances in solar panel construction. Scirus is known for being a comprehensive research tool for scientific information, and as such, it would provide access to specialized resources, scholarly articles, and technical reports on the latest advancements in solar technology. By contrast, the latest stock market prices would be best searched through a financial database, constitutional law reform history through legal databases or specific court websites, and trivial information like who won American Idol in a particular year would typically be found through a simple web search.
Since advances in solar panel construction are often published in scientific journals and research papers, Scirus would provide the most relevant and accurate results for this topic.