Interplanetary GasThe behavior of solid particles in a low-mass solar nebula during settling to the central plane and the formation of planetesimals is examined. Gravitational instability in a dust layer and collisional accretion are considered as possible mechanisms of planetesimal formation. Non-Kepler...
O A cloud of dust and gases gathered into a rotating nebula composed mostly of the Rocky materials seen on Earth today. Paragraph 2:Nearly five billion years ago, some external influence, such as a shock wave traveling from a catastrophic explosion (supernova), may have triggered the collapse...
Osmond had noticed that some spaces, like 正在翻译,请等待... [translate] agetup getup [translate] a The solar system formed from a piece of a nebula of gas, ice, and dust. 太阳系从气体、冰和尘土星云的片断形成了。 [translate] ...
O A cloud of dust and gases gathered into a rotating nebula composed mostly of the Rocky materials seen on Earth today. Paragraph 2:Nearly five billion years ago, some external influence, such as a shock wave traveling from a catastrophic explosion (supernova), may have triggered the collapse...
This “minimum mass solar nebula” is defined to be the minimum amount of hydrogen–helium gas with dust, in bulk solar system proportions, that is needed in order to form our solar system's planets (Hoyle, 1960; Weidenschilling, 1977a). It is calculated by summing the assumed amount of...
In conclusion, the origin of the solar system has been a subject of scientific inquiry for many years. The nebular theory, which suggests that our solar system formed from a rotating cloud of gas and dust called the solar nebula, is the most widely accepted explanation. The concept of the ...
O The primordial matter that evolved into our solar system consisted mostly of familiar elements such as oxygen, carbon, and nitrogen. O A cloud of dust and gases gathered into a rotating nebula composed mostly of the Rocky materials seen on Earth today. 2. The word “frigid” in the ...
Around 4.6 billion years ago, the early solar systembegan to takeshape from a massive cloud of gas and dust known as the solar nebula. Triggered by an external force — possibly a nearby supernova — the nebula collapsed under the force of gravity and started spinning, due to the conservati...
Solar nebula, gaseous cloud from which, in the so-called nebular hypothesis of the origin of the solar system, the Sun and planets formed by condensation. Swedish philosopher Emanuel Swedenborg in 1734 proposed that the planets formed out of a nebular cr
The solar system formed about4.6 billion years agofrom a giant rotating cloud of gas and dust known as the solar nebula. Gravity caused the nebula to collapse in on itself, forming a dense, hot core that ignited to become the sun.