Browsing by Subject "astronomy"

Now showing 1 - 5 of 5

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Automating data management system of 1.5-meter telescope at Tartu Observatory
(Tartu Ülikool, 2020) Suchockas, Laimonas; Eenmäe, Tõnis; Ramler, Heleri; Tartu Ülikool. Loodus- ja täppisteaduste valdkond; Tartu Ülikool. Tehnoloogiainstituut
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Commentatio astronomica de calculo trajectoriarum
(1805) Pfaff, Johann Wilhelm Andreas
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Ideen zur Perturbations Rechnungs nach Kepler
(1814) Pfaff, Johann Wilhelm Andreas
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Imaging with Diffractive Axicons Rapidly Milled on Sapphire by Femtosecond Laser Ablation
(2023) Smith, Daniel; Ng, Soon Hock; Han, Molong; Katkus, Tomas; Anand, Vijayakumar; Juodkazis, Saulius
We show that single-pulse burst fabrication will produce a flatter and smoother profile of axicons milled on sapphire compared to pulse overlapped fabrication which results in a damaged and much rougher surface. The fabrication of large-area (sub-1 cm cross-section) micro-optical components in a short period of time (∼10 min) and with less processing steps is highly desirable and would be cost-effective. Our results were achieved with femtosecond laser fabrication technology which has revolutionized the field of advanced manufacturing. This study compares three configurations of axicons such as the conventional axicon, a photon sieve axicon (PSA) and a sparse PSA directly milled onto a sapphire substrate. Debris of redeposited amorphous sapphire were removed using isopropyl alcohol and potassium hydroxide. A spatially incoherent illumination was used to test the components for imaging applications. Non-linear reconstruction was used for cleaning noisy images generated by the axicons.
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Terraparsec — A 2D Simulation Game of Exoplanetary Survey and Space Exploration
(Tartu Ülikool, 2025) Peäske, Rasmus; Muhhin, Mark, juhendaja; Tartu Ülikool. Loodus- ja täppisteaduste valdkond; Tartu Ülikool. Arvutiteaduse instituut
This thesis presents the design and implementation of an educational space exploration simulation game titled Terraparsec. The game is meant to provide an engaging experience through which players can explore diverse star systems and assess exoplanetary habitability. Simultaneously, the game aims to enhance players' understanding of astronomical concepts by introducing basic principles of planetary habitability that are directly derived from established scientific foundations.