Reference Perihelion is the point at which an orbiting body is closest to the sun. The word comes from Greek and literally means around (peri) the sun (helios).
The surface of asteroid Bennu acts like an impact-absorbing crumple zone that protects the space rock from forming craters, a new study based on OSIRIS-REx observations reveals.
Hungarian astronomer Krisztián Sárneczky has discovered hundreds of asteroids. Now he wants to make his tiny country the second best at spotting unknown space rocks after only the U.S.
Filaments of plasma escaped from a fiery canyon that opened on the sun's surface on Sunday (April 3) and might bring more auroras to Earth later this week.
The launch of the first U.S. private civilian space mission heading for the International Space Station will be delayed to at least Friday (April 8), Axiom Space, which funds the mission, announced.
NASA's Solar Dynamics Observatory captured yet another solar flare blasting from the same overactive sunspot that triggered radio blackouts and stunning aurora displays on Earth earlier this week.
Sound travels much more slowly on the Red Planet than it does on Earth but also behaves in some unexpected ways that could have strange consequences for communication on the planet.
The sun is waking up and we are experiencing the effects on Earth as disruptive radio blackouts and stunning aurora displays.
A powerful solar storm is set to hit Earth on Thursday with spectacular aurora displays accompanying it after the sun fired nearly 20 flares from a single sun spot in just two days.
Keeping technical systems in top shape helps Ukraine's defense forces stay ahead of Russian aggressors. But with a lack of in-house experts, the military has to rely on capable volunteers.
A Hungarian astronomer nearly discovered a second space rock on a collision course with Earth in less than one month.
Satellites owned by the U.S. Earth observation company Maxar spotted a container ship that had been stuck for over two weeks in the shallow waters of the Chesapeake Bay near Baltimore, Maryland.
New documents suggest that NASA officials dismissed concerns raised by the LGBTQ community over the name of its newest observatory, the James Webb Space Telescope.
NASA selected a full year of observations for Webb but is keeping its first science targets top secret.
The European sun-chasing spacecraft Solar Orbiter has snapped the closest image of the sun ever taken, revealing the finest details of our star's outer atmosphere, the corona.
Astronomers in the future might not be allowed to build large complex power-hungry observatories if they want to reduce their carbon footprint in line with greenhouse gas emission reduction targets.
The Bohr model is a neat but quite imperfect depiction of the inner workings of an atom before things got too muddled up by quantum principles.
Five European space missions, including a telescope searching for dark energy, have been left without a launch ticket after Russia stopped supplying rockets to Europe.
Last year's Juno flyby at Jupiter's largest moon Ganymede revealed a surface covered in craters as well as shimmering auroras stretching between the moon's poles and the equator.
The European ExoMars rover is unlikely to launch before 2026, the European Space Agency (ESA) admitted, as it ponders ways forward for the beleaguered mission.
The James Webb Space Telescope's main mirror is fully aligned and performs better than it had been designed for, NASA revealed in a briefing on Wednesday (March 16).
Samples from asteroid Ryugu are the most pristine pieces of our solar system ever studied and contain amino acids that could have given rise to life on Earth.