Haze

Like labels on cigarettes, these stickers would warn of the dangers of fossil fuels on the environment.

A 20-year Hubble study of Uranus provide valuable data for understanding the atmospheric dynamics of this distant ice giant, which can serve as a proxy for studying exoplanets of similar size and composition.

Hubble images reveal changes on Uranus for the four years that Hubble's STIS instrument observed Uranus across a 20-year period.

An image authentically shows Saturn photographed from NASA's Cassini spacecraft during its final mission in 2017.

This NASA Hubble Space Telescope image shows the planet Jupiter in a color composite of ultraviolet wavelengths. Released on Nov. 3, 2023, in honor

From the eerie haze that choked London to the deadly fog that gripped Donora, Pennsylvania, these episodes have long been our cautionary tales of urban and industrial excesses. Wildfire smoke and modern pollution studies often come with alarming projections of imminent doom, yet they sidestep the grim specifics uncovered during these infamous historical episodes. Who were the victims? What happened to the…

These Earth-size ovals at Jupiter's north and south poles are visible only at ultraviolet (UV) wavelengths, and appear and disappear seemingly at random.

Astronomers using the NASA/ESA Hubble Space Telescope observed Jupiter's most distinctive feature, the Great Red Spot, with on eight dates over a single, 90-day oscillation cycle from December 2023 to March 2024.

Mars was once a very wet planet, as is evident in its surface geological features. Scientists know that over the last 3 billion years, at least some water went deep underground, but what happened to the rest? Now, NASA's Hubble Space Telescope and MAVEN (Mars Atmosphere and Volatile Evolution) missions are helping unlock that mystery.

Planetary scientists have been searching the cosmos for liquid water. Here are the most promising water worlds in the solar system and beyond.

Western wildfire smoke is coming into Delaware and causing brilliant sunsets and sunrises.

NASA's Hubble Space Telescope captured this image of Saturn and its colossal rings on July 4, 2020, during summer in the gas giant's northern hemisphere. Two

The James Webb Space Telescope will soon investigate stunning light shows from Uranus and Saturn as two projects look at the auroras of these planets to...

International talks over how to govern solar geoengineering — a controversial tactic for addressing climate change by reflecting solar radiation — ended in a stalemate.

On Saturn's largest moon, Titan, snows of organic compounds may form glacier-like honeycomb chunks in methane lakes, appearing as floating "magic islands."

Our knowledge of Uranus and Neptune was revolutionized by the flybys of NASA's Voyager 2 spacecraft on January 24, 1986 and August 25, 1989, respectively.

Neptune has long been depicted as a deeper, darker blue than its fellow ice giant Uranus, but a new study shows that both are a similar shade of light greenish blue.

The observations are vital for piecing together the science objectives for a future mission to Uranus.

With Planet Earth running a fever, U.N. climate talks focused Sunday on the contagious effects on human health.

Planetary scientists simulate how haze might be obstructing our view of exoplanet's atmospheres, and potentially alien water.