A "smoky umbrella" blocked the sun's rays and worsened air pollution in New York and New Jersey during the event. Here's how.

A newly discovered comet, called C/2025 F2 (SWAN), may have disintegrated. But the remnants are still visible.

Amateur astronomers Vladimir Bezugly from Ukraine, Michael Mattiazzo in Australia and US-based Rob Matson each ... Battams recommends looking “low to the northeast horizon an hour or two before ...

Cities in California make up a significant proportion of the country's most polluted metropolitan areas when it comes to air ...

The map below shows which states have measles cases ... If the spread of measles continues as it has been, the U.S. risks losing its “measles elimination status,” a designation the country ...

There have been 307 hurricanes that made landfall in the mainland United States since records began in 1851, and now you can see them all on a single map ... very hard for a northeast-moving ...

The northern lights may be visible as far south as Idaho, New York and South Dakota following strong solar storm activity.