What is Perihelion? In the vast expanse of space, celestial bodies follow elliptical orbits around stars, with one point being closer to the star—known as the perihelion. This is the term used to ...

NASA has lost contact with one its three spacecraft orbiting Mars, the agency announced Tuesday. Meanwhile, a second Mars ...

The photo, taken during the X-37B’s seventh mission, shows Earth from High-Elliptical Orbit. On Feb. 20, 2025, the Secretary of the Air Force Public Affairs uploaded on the DVIDS website, what is ...

Earth will reach perihelion at 09:00 Universal Time on Saturday, January 4, 2025, the closest point to the sun in its annual, slightly elliptical orbit. The word comes from the Greek words peri (near) ...

The last supermoon of the year will shine soon in December skies. The moon’s orbit around the Earth isn’t a perfect circle so ...

Stig Nilsson a colonel in the Norwegian Ministry of Defence’s Department for Defence Policy and Long Term Planning, said Space Norway should have two highly elliptical satellites under construction by ...

There aren’t a ton of specifics about what the military’s X-37B has been up to in space, but we now know one thing for certain: The view is pretty good. On Thursday, Feb. 20, the Space Force released ...

The December full moon rose over an egret-themed weathervane atop a house on Van Ness Street in Santa Cruz this week.

As viewed from the historic Mill Street Pier in West Sacramento’s Bridge District, Thursday night’s supermoon emerged over ...

Planetary scientists have proposed a solution to the centuries-old problem of why the Moon’s far side bulges at its equator. Ian Garrick-Bethell and colleagues at the Massachusetts Institute of ...

Our planet’s elliptical orbit doesn’t affect winter or summer temperatures. But some astronomers wonder whether it’s a factor in why life survives. By Shannon Hall This story was updated to reflect ...

When you look at how the planets orbit in our Solar System, the correct answer was given hundreds of years ago: first by Kepler, whose laws of motion described it, and then by Newton, whose law of ...