Science ❯ Earth Sciences

Seasons

Seasonal Changes Winter Astronomical Seasons Equinox Summer Autumn Equinox Axial Tilt Climate Change Solar Positioning Solar Cycles Season Lengths Tilt of the Earth Astronomy Earth's Axial Tilt Meteorological Seasons Earth's Axis Winter Solstice

Earth Reaches Aphelion, Its Farthest Point From the Sun

Scientists say Earth’s 23.5° axial tilt and the uneven mix of land and ocean — not orbital distance — set seasons and shape global temperatures.

Winter Solstice Has Passed With Daylight Growing, Sunrise Still Drifting Later

Winter Solstice Arrives Dec. 21 as Sunsets Begin to Shift Later

Equinox Boosts Northern Lights Chances as NOAA Flags Minor Geomagnetic Storms

Canada Day Geomagnetic Storm Watch Signals Northern Lights into Lower Latitudes

Summer Solstice 2025 Arrives at 10:42 p.m. EDT Friday