Results 131 to 140 of about 591,139 (353)
Extension of earth orbits using low-thrust propulsion [PDF]
, 2010 The primary motivation for the utilization of space for environmental science, and in-particular Earth Observation, is the unique vantage point which a spacecraft can provide.
Anderson, Pamela, Macdonald, M.
core
Mission design for LISA Pathfinder
, 2004 Here we describe the mission design for SMART-2/LISA Pathfinder. The best trade-off between the requirements of a low-disturbance environment and communications distance is found to be a free-insertion Lissajous orbit around the first co-linear Lagrange ...
Gómez G Jorba À Masdemont J Simó C +3 more
core +1 more source
Ionospheric Aerodynamics in Low Earth Orbit
, 2017 Understanding perturbing forces takes on new significance as the Low Earth Orbit (LEO) environment becomes increasingly congested and the risk of collision events that threaten access to space infrastructure grows. The perturbation caused by the charged aerodynamic interaction of LEO objects with the ionosphere ("ionospheric aerodynamics'') is ...
openaire +2 more sources
Possible role of human ribonuclease dicer in the regulation of R loops
FEBS Open Bio, EarlyView.R loops play an important role in regulating key cellular processes such as replication, transcription, centromere stabilization, or control of telomere length. However, the unscheduled accumulation of R loops can cause many diseases, including cancer, and neurodegenerative or inflammatory disorders. Interestingly, accumulating data indicate a possible
Klaudia Wojcik +2 more
wiley +1 more source
Use of lunar produced propellants for manned Mars missions [PDF]
Manned Mars Mission departures from low lunar orbit (LLO), L2, and low Earth orbit (LEO), using oxygen or oxygen and hydrogen produced on the Lunar surface; or Phobos produced propellants; are compared to departures from LEO using Earth produced ...
Babb, Gus R., Stump, William R.
core +1 more source
Chemical interactions in Low Earth Orbit (LEO) [PDF]
Although several observations of material changes on-orbit have been reported, mechanistic understanding has not yet become clear because new sets of non-intuitive processes are occurring on orbit. Reactant kinetic energy, low collision rates and surface/
Green, B. D.
core +1 more source
Where can we find Super-Earths? [PDF]
arXiv, 2009 In recent years we have been witnessing the discovery of one extrasolar gas giant after another. Now the time has come to detect more low-mass planets like Super-Earths and Earth-like objects. An interesting question to ask is: where should we look for them?
arxiv
Future radiation measurements in low Earth orbit [PDF]
The first Long Duration Exposure Facility (LDEF) mission has demonstrated the value of the LDEF concept for deep surveys of the space radiation environment. The kinds of measurements that could be done on a second LDEF mission are discussed.
Adams, James H., Jr.
core +1 more source
Linear energy transfer (LET) spectra of cosmic radiation in low earth orbit [PDF]
, 1990 A.B. Akopova +9 more
openalex +1 more source
Space augmentation of military high-level waste disposal [PDF]
Space disposal of selected components of military high-level waste (HLW) is considered. This disposal option offers the promise of eliminating the long-lived radionuclides in military HLW from the earth.
Divita, E., English, T., Lees, L.
core +1 more source