collapsing cloud

That is ,a quark star is a black hole,while the black hole formation has not collapsed to one point yet.

结果表明夸克星的质量分布在事件视界以内,即夸克星是黑洞,但构成这种黑洞的物质并没有坍缩到大小为零的一点。

Through almost 30 years observation and study, astronomers come to a relatively clear agreement that low mass stars form by collapse, accretion and outflow.

近30多年的观测研究使得天文学家对小质量恒星的形成有了相对明确的认识:小质量恒星通过坍缩、吸积和外向流的路标而形成。

In this paper, we study the effects ofκ0in the equation of state on the core collapse ,shock propagation ,explosion energy and temperature of iron core at t 4, using the data of presupernova given by Woosley in 2002.

包括大质量恒星的演化、超新星的分类、超新星的爆发机制、引起恒星不稳定坍缩的物理因素等;同时论述了Ⅱ型超新星爆发所应用的数值模拟相关物理因素和数值处理方法,包括电子俘获的一般分析方法、“四粒子”模型的物态方程、广义相对论流体动力学方法和数值模拟差分方法。

The collapse of the protostella is extremely non-homologous.

原恒星云的坍缩是极其不保形的。

During collapse, the dark cloud "fragments" into a series of dense clumps.

在坍缩过程中，暗云“碎裂”为一批稠密的团块。

How the Neutrino in Collapse Phase Affect Type Ⅱ Supernova Explosion

坍缩阶段中微子对II型超新星爆发的影响

As soon as this occurred, the giant gas ball collapsed rapidly.

一旦出现这种情况，这个庞大的气体球便迅速坍缩。

Two-and three-dimensional hydrodynamic computer codes have been applied to the study of the early phases of the collapse of a gas cloud.

二维和三维流体力学计算机程序，已用于研究气体云的早期坍缩。

A star is formed when a cloud of gas collapses from the interstellar medium toward high density.

一个气体云自星际物质中坍缩，密度达到很高时，即形成了一个恒星。

The addition of matter over this critical value would lead to the collapse of the star without limit because of the ever-increasing gravitational forces.

质量超过临界值时，增加着的引力将造成恒星的无限坍缩。

The star manages to avoid collapsing at this point because of the equllibrium achieved by it.

这时由于自身取得的平衡，恒星成功地避免了坍缩；

Research on the Physical Process and Explosion Mechanism of Core-collapse Supernova;

核心坍缩型超新星的相关物理过程及爆发机制的研究

Quantum Teleportation Scheme of N-level States Without the Collapse of Postulation;

勿需测量坍缩假定的N能级量子态的隐形传递方案

After the initial collapse hydrodynamic phases, a young stellar object is still embedded deep within its progenitor.

在初始坍缩和流体力学阶段之后，一个年青星体仍然深深嵌在产生它的母体之中。

If the universe is dense enough, gravitation can overcome the expansion and pull it back until it ultimately collapses.

如宇宙的密度足够大，引力就能够克服膨胀，并把宇宙拉回来，直到它最后发生坍缩。

Collapsing interstellar cloud reverses its gravitational infall and expands outward into the relatively quiescent interstellar environment.

坍缩的星际云克服向内的引力而向外膨胀到较宁静的星际环境中去。

All black holes are formed from the gravitational collapse of a star, usually having a great, massive, core.

所有的黑洞都是因为恒星的引力坍缩而形成，这种恒星通常有一颗巨大而厚重的核心。

Progressively, larger objects substantially increase the timescale for collapse over still longer wavelengths.

进而言之，较大的天体，因要在更长的波长上坍缩，将大大增长时间尺度。

Colliding black holes, collapsing stars, and spinning compact celestial objects such as pulsars create ripples in the fabric of space and time that subtly distort the world around us.

黑洞碰撞、星坍缩以及自旋脉冲星所激起的时空结构波动，微妙的扭曲了我们周围的世界。

A burnedout star could collapse to so small a radius as to make the effects of general relativity quite important near its surface.

一个燃烧完的星球可能坍缩到如此之小的半径，以致在其表面附近，广义相对论效应相当重要。

Instead, they would collapse to form galaxies and stars, starting from about two billion years after the Big Bang.

然后反过来，坍缩而形成诸星系及恒星，这种情况开始于大爆炸之后约20亿年。