Results 1 to 10 of about 4,042,448 (357)

Can a Spacecraft Use Solar Panels at Saturn? [PDF]

open access: yes, 2001
This hands-on activity is designed to introduce students to the complexities of using solar panels in space exploration.

core  

Relationship Between Recurrent Magnetic Flux Rope and Moving Magnetic Features

open access: yesUniverse
Large-scale magnetic flux ropes (MFRs) usually become visible during an eruption and are the core structures of coronal mass ejections, but the nature of MFRs is still a mystery. Here, we identify a large transequatorial MFR that spans across NOAA 13373 (
Yin Zhang   +6 more
doaj   +1 more source

Development and validation of a ground-based Asymmetric Spatial Heterodyne Spectroscopy (ASHS) system for sounding neutral wind in the mesopause [PDF]

open access: yesAtmospheric Measurement Techniques
Winds in the mesopause region are key to understanding atmospheric dynamics. This study presents a novel ground-based Asymmetric Spatial Heterodyne Spectroscopy (ASHS) system designed to measure these winds by observing the nighttime green line airglow ...
G. Zhu   +20 more
doaj   +1 more source

IonoGAN: An Enhanced Model for Forecasting Quiet and Disturbed Ionospheric Features From Predicted Ionograms

open access: yesSpace Weather
Ionograms are radar echo graphs that depict vertical ionospheric density profiles, structures, fluctuations, and irregularities, with the F region represented by F‐trace and Spread‐F features in the graphs.
Chu Qiu   +11 more
doaj   +1 more source

Dynamic X-ray imaging of the magnetosheath expected during a super storm

open access: yesFrontiers in Astronomy and Space Sciences
The Earth’s magnetosheath is a vital source region of soft X-ray emissions generated by the solar wind charge exchange (SWCX) mechanism in geospace.
Yuqi Gong   +7 more
doaj   +1 more source

Cosmic Survey: What are Your Ideas About the Universe? [PDF]

open access: yes, 2003
This product contains lesson plans and an activity composed of a three-part questionnaire that launches students on discussions about where objects in space are located, and when they were formed, as well as an introduction to the concepts of structure ...

core  

The space station: Human factors and productivity [PDF]

open access: yes
Human factor researchers and engineers are making inputs into the early stages of the design of the Space Station to improve both the quality of life and work on-orbit.
Burns, M. J.   +3 more
core   +1 more source

The Core of Omega Centauri (NGC 5139) Lithograph and In Search of...Stellar Evolution Classroom Activity [PDF]

open access: yes, 2010
This Hubble Space Telescope image reveals a small region inside the massive globular cluster Omega Centauri, which boasts nearly 10 million stars. This colorful assortment of 100,000 stars residing in the crowded core of the cluster is one of the first ...

core  

Nighttime Atomic Hydrogen Abundance Retrieved From SCIAMACHY Hydroxyl Airglow Measurements in the Mesopause Region

open access: yesGeophysical Research Letters
Atomic hydrogen (H) is crucial for understanding photochemistry and the energy budget in the mesopause region. However, there is still no consensus on the H abundance in this region.
Xiaolin Wu   +4 more
doaj   +1 more source

Quantitative analysis of nighttime effects of radiation belt energetic electron precipitation on the D-region ionosphere during lower solar activity periods [PDF]

open access: yesAtmospheric Chemistry and Physics
Energetic electron precipitation (EEP) from the Earth's radiation belts can ionize neutral molecules in the D-region ionosphere (60–90 km altitude), significantly influencing the conductivity and chemical species therein.
X. Dong   +23 more
doaj   +1 more source

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