A new study suggests that distant "long-period" comets -- which take more than 200 years to orbit the sun -- are more common than previously thought. This illustration shows how the researchers used data from NASA's Wide-field Infrared Survey...
Slice through the celestial equator showing the radial component of the velocity field (in kilometres per second). Blue regions are falling towards us and red regions are flying away from us. Galaxies of the Sloan Digital Sky Survey main...
Auroras at Jupiter.
Credit: Copyright JAXA
Combined observations from three spacecraft show that Jupiter's brightest auroral features recorded to date are powered by both the volcanic moon Io and interaction with the solar wind.
At Earth, auroras are clearly driven by...
The Tadpole Galaxy is a disrupted spiral galaxy showing streams of gas stripped by gravitational interaction with another galaxy. Molecular gas is the required ingredient to form stars in galaxies in the early universe.
Credit: Hubble Legacy Archive, ESA, NASA...
The Earth's magnetosphere is home to the plasma waves being studied by Yuri Shprits and colleagues.
Credit: NASA
In the 1960s, NASA launched six satellites to study Earth's atmosphere, magnetosphere and the space between Earth and the moon. Using observations from...
Space is not empty, nor is it silent. The region around Earth is filled with magnetic field lines and trapped energetic particles, zooming about in a high-speed dance around the planet (shown here in an illustration).
Credit: NASA's Goddard Space...
This artist's impression shows one of the three newly discovered planets in the star cluster Messier 67. In this cluster the stars are all about the same age and composition as the Sun. This makes it a perfect laboratory...
Simulation of the interior of a solar-type star.
Credit: University of Montréal - DAp/CEA - AIM
The Sun is a solar-type star, a new study claims -- resolving an ongoing controversy about whether the star at the center of our Solar...
Smallest star ever discovered. Very small and dim stars are the best possible candidates for detecting Earth-sized planets which can have liquid water on their surfaces.
Credit: Amanda Smith
The smallest star yet measured has been discovered by a team of...
his enhanced-color image of Jupiter's Great Red Spot was created by citizen scientist Jason Major using data from the JunoCam imager on NASA's Juno spacecraft. The image was taken on July 10, 2017 at 07:10 p.m. PDT (10:10 p.m....
Will another planet be added to the list of Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus and Neptune in our Solar System?
Credit: NASA
Last year, the existence of an unknown planet in our Solar system was announced. However, this hypothesis...
