LINVILLE, N.C. (AP) — The newly discovered comet Neowise is only visible from Earth once every 6,800 years, and photographers who want to document it seek places with high elevation and little ...

The innermost planets straddle nighttime, with Mercury in the evening and the greatest western elongation of Venus in the ...

ESA’s Comet Interceptor will be the first spacecraft to visit a comet coming directly from the outer reaches of the Sun, carrying material untouched since the dawn of the Solar System.