Interstellar Grains in the Solar System: Requirements for an Analysis

1996 ◽  
pp. 259-264 ◽  
Author(s):  
Ingrid Mann
Keyword(s):  
Solar System ◽  
Interstellar Grains ◽  
System Requirements

scholarly journals The Early Evolution of the Solar System

1971 ◽  
Vol 13 ◽  
pp. 347-353 ◽  
Author(s):  
A. G. W. Cameron
Keyword(s):  
Solar System ◽  
Pressure Gradient ◽  
Solar Nebula ◽  
Radial Force ◽  
Interstellar Cloud ◽  
Early Evolution ◽  
Force Balance ◽  
Centrifugal Forces ◽  
Outer Portion ◽  
Interstellar Grains

The problems of relating collapse conditions in an interstellar cloud to a model of the primitive solar nebula are discussed. In such a nebula there is a radial force balance between gravity, the pressure gradient, and centrifugal forces due to the rotation. Approximate values are given for the combinations of temperature and density throughout the nebula, from a maximum of about 2000° K near the center to less than 200° K in the outer portion. These conditions are based upon the compression adiabats in the terminal stages of the collapse of an interstellar cloud. One general conclusion, of great importance for accumulation of bodies within the solar system, is that interstellar grains should not be completely evaporated at distances in the nebula beyond about one or two astronomical units.

scholarly journals 4. Oort’s Cometary Cloud in the Light of Modern Cosmogony

1977 ◽  
Vol 39 ◽  
pp. 483-484
Author(s):  
V. S. Safronov
Keyword(s):  
Solar System ◽  
Ad Hoc ◽  
Solar Nebula ◽  
Slow Growth ◽  
Large Mass ◽  
Giant Planets ◽  
Interstellar Grains ◽  
Small Density ◽  
Rule Out

Although the existence of Oort’s cometary cloud has been generally accepted, his hypothesis on its origin has been repeatedly called into question, in particular because of the large mass that Jupiter would also have simultaneously ejected out of the solar system. However, the extremely slow growth of particles in regions of small density seems to rule out that comets condensed “in situ” at their present large distances. Also, the accumulation of interstellar grains in satellite disks orbiting around the primitive solar nebula seems an “ad hoc” hypothesis that cannot be proved or disproved. Therefore, the most reasonable hypothesis is that comets were ejected from the region of the giant planets as a natural by-product of their accretion.

scholarly journals Penggunaan Teknologi Augmented Reality Dalam Mempelajari Sistem Tata Surya dengan Android

Faktor Exacta ◽  
2018 ◽  
Vol 11 (2) ◽  
pp. 179
Author(s):  
Aswin Fitriansyah
Keyword(s):  
Augmented Reality ◽  
Solar System ◽  
Human Life ◽  
Font Size ◽  
Analysis And Design ◽  
Augmented Reality Application ◽  
Human Tendency ◽  
History Of ◽  
System Requirements ◽  
The Many

<p><span style="font-size: medium;"><strong>Abstract</strong>. In the history of human life, science is one of the bridges of man to perfection. The human tendency to become pious makes it always move forward to become a better creation day by day. One of the many dynamic movements of humans is reflected in the development of technology and information that helps human work to be more effective and efficient, especially in the application of learning media. Based on this reason, an Augmented Reality application was developed in the learning of the solar system. Through the analysis and design of application infrastructure built using the waterfall method, the analysis stages include system weakness analysis and system requirements analysis, design or design which includes a modeling system using flowchart. From this study produced an Andorid based solar learning Augmented Reality application.</span></p><p><span style="font-size: medium;">Keywords: Solar System, System, Android</span></p>

Streaming of interstellar grains in the Solar System

Nature ◽  
1979 ◽  
Vol 282 (5736) ◽  
pp. 276-278 ◽  
Author(s):  
B. Å. S. Gustafson ◽  
N. Y. Misconi
Keyword(s):  
Solar System ◽  
Interstellar Grains

The Origin of the Moon

1962 ◽  
Vol 14 ◽  
pp. 149-155 ◽  
Author(s):  
E. L. Ruskol
Keyword(s):  
Chemical Composition ◽  
Solar System ◽  
The Moon ◽  
The Earth ◽  
The Difference ◽  
Origin Of The Moon

The difference between average densities of the Moon and Earth was interpreted in the preceding report by Professor H. Urey as indicating a difference in their chemical composition. Therefore, Urey assumes the Moon's formation to have taken place far away from the Earth, under conditions differing substantially from the conditions of Earth's formation. In such a case, the Earth should have captured the Moon. As is admitted by Professor Urey himself, such a capture is a very improbable event. In addition, an assumption that the “lunar” dimensions were representative of protoplanetary bodies in the entire solar system encounters great difficulties.

The Origin of the Moon and its Relationship to the Origin of the Solar System

1962 ◽  
Vol 14 ◽  
pp. 133-148 ◽  
Author(s):  
Harold C. Urey
Keyword(s):  
Solar System ◽  
The Moon ◽  
The Past ◽  
The Earth ◽  
Short Period ◽  
Origin Of The Moon

During the last 10 years, the writer has presented evidence indicating that the Moon was captured by the Earth and that the large collisions with its surface occurred within a surprisingly short period of time. These observations have been a continuous preoccupation during the past years and some explanation that seemed physically possible and reasonably probable has been sought.

Stellar Evolution

1962 ◽  
Vol 11 (02) ◽  
pp. 137-143
Author(s):  
M. Schwarzschild
Keyword(s):  
Solar System ◽  
Stellar Evolution ◽  
Space Craft ◽  
New Techniques ◽  
Substantial Body ◽  
Individual Stars ◽  
The Past ◽  
Evolution Of Galaxies ◽  
History Of ◽  
Fast Flow

It is perhaps one of the most important characteristics of the past decade in astronomy that the evolution of some major classes of astronomical objects has become accessible to detailed research. The theory of the evolution of individual stars has developed into a substantial body of quantitative investigations. The evolution of galaxies, particularly of our own, has clearly become a subject for serious research. Even the history of the solar system, this close-by intriguing puzzle, may soon make the transition from being a subject of speculation to being a subject of detailed study in view of the fast flow of new data obtained with new techniques, including space-craft.

Dynamics of comets in the collapsing protosolar nebula

1999 ◽  
Vol 173 ◽  
pp. 45-50
Author(s):  
L. Neslušan
Keyword(s):  
Solar System ◽  
Velocity Distribution ◽  
Oort Cloud ◽  
Interstellar Clouds ◽  
Protosolar Nebula ◽  
Moving Bodies

AbstractComets are created in the cool, dense regions of interstellar clouds. These macroscopic bodies take place in the collapse of protostar cloud as mechanically moving bodies in contrast to the gas and miscroscopic dust holding the laws of hydrodynamics. In the presented contribution, there is given an evidence concerning the Solar system comets: if the velocity distribution of comets before the collapse was similar to that in the Oort cloud at the present, then the comets remained at large cloud-centric distances. Hence, the comets in the solar Oort cloud represent a relict of the nebular stage of the Solar system.

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