At the Northern Hemisphere’s winter solstice the upper half of the Earth is at its furthest lean away from the sun — leading to the shortest day and longest night of the year. The winter solstice ...

The combination of the elliptical orbit, affecting the speed of the planet, and the axial tilt, causing the length of ...

Scientists outline the scientific and technical case for building a northern-hemisphere 30-meter telescope at La Palma to support time-domain and multi-messenger astronomy.

The December Solstice marks the beginning of winter in the northern hemisphere as the Sun takes its shortest trip across the sky.

Last summer's sweltering heat broke more than city or regional or even national records. In what they call an "alarming finding," scientists say that in the Northern Hemisphere, the summer of 2023 was ...

Size matters when it comes to telescopes. The bigger they are, the farther they can see. Prioritizing constructing large ones ...

April was the first month in recorded history with average carbon dioxide levels at or above 400 parts per million across the Northern Hemisphere, according to a May 26 announcement by the World ...

I derived a zonal index by subtracting the December–February mean sea-level pressure northwards of 45° N from the mean sea-level pressure between the Equator and 45° N using two data sets: the NCEP ...

The June solstice is here once again, marking the longest daylight period of the year and the start of astronomical summer in Earth’s northern hemisphere. At 5:04 UTC (1:04 a.m. EDT) on June 21, the ...