Eventually, dust particles began to stick together and form larger bodies called planetesimals. Even more matter flying around collided with these planetesimals and stuck to them in a process called accretion. As the bodies spun themselves and gravity brought in more dust and gas, the planetesimals...
While solids, liquids, and gases are familiar states of matter, there is a fourth state called plasmas which is the most common form of matter in the universe. It can be found in the sun and other celestial bodies in our solar system. However, denseplasma, which is a hot mixture of at...
According to the recent study, Quasar J0529-4351 has a huge “stomach”. Like other quasars, it keeps taking in gas and dust in the space. In fact, it has the largest accretion disk (吸积盘) in the universe. It “eats” about as much as the sun’s mass (质量) every day, which...
Durisen is advocating a middle road - a little gravitational instability mixed in with a little core accretion. You may like Death Spiral: Why Theorists Can’t Make Solar Systems Simulations Show How Earth-Like Planets Can Form "There are two camps in planet formation. Dick [Durisen] is...
"We started to think that real disks may not actually exist around the most massive forming stars, and that those stars might have to form in a different way," said Dr Johnston. "Maybe the accretion into an O-type star was much more chaotic and dynamic than for the birth of our Sun....
This process of accretion is one of the most efficient energy-producing processes known; up to 40% of the rest mass of the accreted material can be emitted as radiation. Someone with a better background with plasmas might be able to estimate the rate interstellar gas falls in. The density...
In addition to coal energy, hydro-power, solar-power and nuclear-power plants will form the backbone of China’s energy security in the future. In comparison to the hydro-power capacity that has reached a limit, there is more room for the growth of solar-power and nuclear-power plants. ...
Smart-substrate: A novel structural design to avert residual stress accretion in directed energy deposition additive manufacturing. Virtual Phys. Prototyp. 2023, 18, e2246041. [Google Scholar] [CrossRef] Raymond, L.; Bandala, E.; Coulter, R.; Valentin, N.; Mitchell, K.; Hua, W.; ...
It is not known precisely what mechanism caused the collapse of part of a molecular cloud into the Sun and its accretion disc. Whatever the cause, when the center became sufficiently dense, it ignited to become the Sun. Streams of particles — known as the “solar wind” — from the new...