The difference between perihelion, when Earth is closest to the Sun, and aphelion, when Earth is farthest from the Sun, is ...

On January 4, 2025, Earth will reach perihelion—its closest point to the Sun for the year—a perfect moment to reconnect with ...

The Leonid meteor shower peaks in North America overnight from Nov. 17 to 18, with "shooting stars" and fast-moving fireballs ...

"Asteroids and comets with a perihelion distance (closest to the Sun) less than 1.3 astronomical units (AU), or approximately ...

The Martian new year arrives with the Red Planet’s vernal equinox. Explaining why requires a deep dive into celestial ...

Though the nearly full moon will likely outshine some of these speedy meteors, you may still be able to catch a glimpse of ...

The comet reached its perihelion on Monday at 7:30 a.m. ET and was completely vaporized after passing within 1% of Earth’s distance from the sun, less than 1 million miles (1.5 million ...

Above: Takaya Okada (Japan) observes Comet C/2023 A3 with his EVSCOPE2. In the background you can see the comet tracing its ...

The Leonid meteor shower is expected to make its annual appearance in the night sky on Nov. 18, seen in the direction of the ...

NASA and the European Space Agency’s Solar and Heliospheric Observatory (SOHO) spotted Comet C/2024 S1 (ATLAS) as it made its closest approach to the Sun on Monday. The affectionately nicknamed ...

ESA/NASA’s Sun-watching SOHO spacecraft spied comet C/2024 S1 ATLAS (entering from bottom right) as it darted toward the Sun. The comet reached its perihelion, or closest approach of the Sun ...