Results 121 to 130 of about 2,935 (226)
Statistical Distribution Function of Orbital Spacings in Planetary Systems
The Astronomical JournalThe minimum orbital separation of planets in long-stable planetary systems is often modeled as a step function, parameterized with a single value ${{\rm{\Delta }}}_{\min }$ (measured in mutual Hill radius of the two neighboring planets).
Jeremy Dietrich +2 more
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, 2008 A return to the Moon will confer scientific benefits in several different fields. Although the principal beneficiary is likely to be planetary science, the lunar surface also offers advantages for observational astronomy and future plans for lunar ...
Crawford, Ian A. +5 more
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Impact of Annually Variable Dust Activity on the Recession of the Martian South Polar Seasonal Cap
The Astronomical JournalSuspended dust is a vital component of Martian climatic system and its temporal-spatial variation can influence the recession of the South Polar Seasonal Cap (SPSC).
Zhibin Li +9 more
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Lunar LIGO: A new concept in gravitational wave astronomy
, 1993 For three decades, physicists have been in search of an elusive phenomenon predicted by Einstein's general theory of relativity; gravitational radiation.
Lafave, Norman, Wilson, Thomas L.
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Pixel-level Terrain Processing of the Martian Surface from Moderate Resolution Images of Tianwen-1
The Astronomical JournalThe moderate-resolution camera (MoRIC) of the Tianwen-1 orbiter, China’s first Mars exploration mission, is a frame-imaging scheme color camera. However, generating a precise digital elevation model (DEM) from these images faces challenges due to the ...
Dingxin Liu +5 more
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Displaced periodic orbits with low-thrust propulsion
, 2009 Solar sailing and solar electric technology provide alternative forms of spacecraft propulsion. These propulsion systems can enable exciting new space-science mission concepts such as solar system exploration and deep space observation.
Simo, Jules +2 more
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Eclipse Prediction and the Length of the Lunar Month in Mayan Astronomy
Cosmovisiones / CosmovisõesOne of the most remarkable achievements of Mayan calendrical astronomy was the in- vention of a lunar theory that combined a fixed lunar calendar with eclipse predictions. Eclipse predictions are shown in the Dresden Codex on pages 51-58. The lunar calendar is reflected in the Maya Lunar Series, which was attached to the chronological statements of ...
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48th Lunar and Planetary Science Conference abstracts
, 2017 This conference brings together international specialists in petrology, geochemistry, geophysics, geology, and astronomy to present the latest results of research in planetary science.
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A Review of Astronomy Education Research
, 2004 The field of astronomy education is rapidly growing beyond merely sharing effective activities or curriculum ideas. This paper categorizes and summarizes the literature in astronomy education research and contains more than 100 references to articles ...
Bailey, Janelle M., Slater, Timothy F.
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Dirt, Gravity, and Lunar-Based Telescopes: The Value Proposition for Astronomy
, 2007 The lunar surface has historically been considered an optimal site for a broad range of astronomical telescopes. That assumption, which has come to be somewhat reflexive, is critically examined in this paper and found to be poorly substantiated. The value of the lunar surface for astronomy may be broadly compelling only in comparison to terrestrial ...
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