Mars (Planet) is defined as a terrestrial planet in the solar system, situated further from the Sun compared to Earth and Venus. It is characterized by its smaller mass, differentiated interior structure consisting of an iron core, silicate mantle, and silicate crust, and a gradual cooling proc...
Theoretical models predict that the radial-drift barrier is a more difficult problem to overcome for mm-dust particles in disks around VLMS, in particular BDs, compared to Sun-like stars. Millimeter observations of BD and VLMS disks have challenged current dust evolution models of protoplanetary ...
Extrasolar planet, any planetary body that is outside the solar system and that usually orbits a star other than the Sun. Extrasolar planets were first discovered in 1992. More than 5,000 are known, and almost 9,000 await further confirmation. Learn more
Venus has no known moons, which makes it nearly unique in our solar system. The only other designated planet without moons isMercury, which is quite close to the sun. Scientists aren't yet sure why some planets have moons and some do not, but what they can say is that each planet ha...
The relative sizes of the planets are also given, orientated in their true axial position with regard to the ecliptic. The nearer planets (and also the Moon) are separately compared (fig. 3); and then shown (on a smaller scale) in comparison with the more distant ones (fig. 4). Finall...
reddish dark regions; the dark region spears to be more space-weathered compared to the nearby bright region based on the spectral data ranging from 0.76 to 2.1 μm obtained by the near-infrared spectrometer (NIRS) with <~17 m spatial resolution (e.g., Abe et al., 2006). After the ...
to complete one spin (compared to Earth’s roughly 24 hours). Venus andUranusare the only planets with retrograde rotation. This means the direction of their spin (clockwise, as seen from above the Sun’s north pole) is the opposite direction to their orbit around the Sun (counterclockwise)...
When possible an attempt was made to align similar types of instruments on each of the missions. Obviously the instruments on the three missions spanning almost 50 years can not be compared 1-to-1. The comparison in Table 2.1 is based on similar functionality in the widest terms. Focusing ...
2024 was the GenAI year. With new and more performant LLMs and a higher number of projects rolled out to production, adoption of GenAI doubled compared to the previous year (source:Gartner). In the same report, organizations answered that they are using AI in more than one part of their...
“If you look at these bodies, their lifetimes are tiny compared to the age of the solar system,” Batygin said. “That means something is putting them there. And so what can it be?” One option could be something called galactic tide, a combination of forces exerte...