Results 1 to 10 of about 5,562 (93)

Space in 150 years: From fantasy through fiction to fact and function [PDF]

open access: yes, 2015
In the last century and a half, space has moved from the realm of fantasy to everyday reality. In parallel, the way space has been regarded by the person in the street and the ideas of what access to space might be used for have evolved extraordinarily.
Southwood, DJ
core   +1 more source

James van Allen and his namesake NASA mission [PDF]

open access: yes, 2013
In many ways, James A. Van Allen defined and “invented” modern space research. His example showed the way for government-university partners to pursue basic research that also served important national and international goals.
Baker, D. N.   +7 more
core   +2 more sources

2006 Fragmentation of Comet 73P/Schwassmann-Wachmann 3B Observed with Subaru/Suprime-Cam

open access: yes, 2009
We analyzed the Subaru/Suprime-Cam images of 73P/Schwassmann-Wachmann 3B and detected no fewer than 154 mini-comets. We applied synchrone-syndyne analysis, modified for rocket effect analysis, to the mini-fragment spatial distribution. We found that most
Ishiguro, Masateru   +3 more
core   +1 more source

Exploration of the moon and planets [PDF]

open access: yes, 1964
Unmanned interplanetary flight - engineering problems of mariner ii space ...
Pickering, W. H.
core   +1 more source

SPICA infrared coronagraph for the direct observation of exo-planets

open access: yes, 2010
We present a MIR coronagraph to target the direct observation of extrasolar planets for SPICA, in which a coronagraph is currently regarded as an option of the focal plane instruments. The primary target of the SPICA coronagraph is the direct observation
Abe   +66 more
core   +1 more source

Origin theories for the eccentricities of extrasolar planets [PDF]

open access: yes, 2007
Half the known extrasolar planets have orbital eccentricities in excess of 0.3. Such large eccentricities are surprising as it is thought that planets form in a protoplanetary disk on nearly circular orbits much like the current states of the solar ...
Namouni, Fathi
core   +3 more sources

The Carbon Monoxide Abundance in Comet 103P/Hartley during the EPOXI Flyby

open access: yes, 2011
We report the detection of several emission bands in the CO Fourth Positive Group from comet 103P/Hartley during ultraviolet spectroscopic observations from the Hubble Space Telescope (HST) on 2010 November 4 near the time of closest approach by NASA's ...
A'Hearn, M. F.   +4 more
core   +1 more source

Origins of NASA names [PDF]

open access: yes
Names are selected for NASA spaceflight projects and programs from various sources. Some have their foundations in mythology and astrology or legend and folklore.
Karegeannes, C. E.   +2 more
core   +5 more sources

Elements of cost comparison for planetary missions with advanced propulsion [PDF]

open access: yes
Cost and performance comparisons are made between chemical propulsion and nuclear electric propulsion for planetary missions at Jupiter and beyond. Nuclear rocket comparisons are made for performance only.
Stearns, J. W.
core   +1 more source

A survey of selected coastal vegetation communities of Florida [PDF]

open access: yes, 1977
A survey of coastal vegetation around Florida was conducted during 1973 and 1974. Seventeen sites were selected and sampled using the transect method to determine species occurrence, relative densities, and habitat development and structure.
Carlton, Jedfrey M.
core  

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