Science ❯ Earth Sciences

Seasons

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

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