Results 111 to 120 of about 211,186 (262)
JWST MIRI MRS Observations of T Cha: Discovery of a Spatially Resolved Disk Wind
Understanding when and how circumstellar disks disperse is crucial to constrain planet formation and migration. Thermal winds powered by high-energy stellar photons have long been theorized to drive disk dispersal.
Naman S. Bajaj +10 more
doaj +1 more source
Statistical Distribution Function of Orbital Spacings in Planetary Systems
The 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
doaj +1 more source
Impact of Annually Variable Dust Activity on the Recession of the Martian South Polar Seasonal Cap
Suspended 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
doaj +1 more source
Lunar crater analysis as an alternative tool for physics and astronomy teaching
Ibson José Maciel Leite +4 more
openalex +1 more source
Astronomy on the Moon: Geological considerations [PDF]
The Moon is an excellent site for astronomical observations. This paper describes two geological aspects related to astronomy from the Moon. First it evaluates the sources of gases near a lunar base as input to calculations reported in a separate paper ...
Taylor, G. Jeffrey
core +1 more source
Pixel-level Terrain Processing of the Martian Surface from Moderate Resolution Images of Tianwen-1
The 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
doaj +1 more source
JWST Captures a Sudden Stellar Outburst and Inner Disk Wall Destruction
We analyze JWST/MIRI observations of T Cha, a highly variable (Δ V ∼ 3–5 mag) accreting Sun-like star surrounded by a disk with a large (∼15 au) dust gap. We find that the JWST mid-IR spectrum is significantly different from the Spitzer spectrum obtained
Chengyan Xie +8 more
doaj +1 more source
Advanced Technology Lunar Astronomy Mission, the Moon as an Immense Optical Bench in Vacuum [PDF]
Peter C. Chen +2 more
openalex +1 more source
Multi-use lunar telescopes [PDF]
The objective of multi-use telescopes is to reduce the initial and operational costs of space telescopes to the point where a fair number of telescopes, a dozen or so, would be affordable.
Boyd, Louis +7 more
core +1 more source

