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Detection of Black Holes01:10

Detection of Black Holes

Although black holes were theoretically postulated in the 1920s, they remained outside the domain of observational astronomy until the 1970s.
Their closest cousins are neutron stars, which are composed almost entirely of neutrons packed against each other, making them extremely dense. A neutron star has the same mass as the Sun but its diameter is only a few kilometers. Therefore, the escape velocity from their surface is close to the speed of light.
Not until the 1960s, when the first neutron...
Total Internal Reflection Fluorescence Microscopy01:05

Total Internal Reflection Fluorescence Microscopy

Total internal reflection fluorescence microscopy or TIRF is an advanced microscopic technique used to visualize fluorophores in samples close to a solid surface with a higher refractive index, such as a glass coverslip. TIRF only allows fluorophores in proximity to the solid surface to be excited. When light from a medium with a lower refractive index (such as air) hits the glass coverslip at a critical angle, the light undergoes total internal reflection stead of passing through the glass.
Atomic Emission Spectroscopy: Instrumentation01:22

Atomic Emission Spectroscopy: Instrumentation

The instrumentation of atomic emission spectrometry (AES) involves various components, including atomization devices that convert samples into gas-phase atoms and ions. There are two main types of atomization devices: continuous and discrete atomizers.  Continuous atomizers, like plasmas and flames, introduce samples in a constant stream, while discrete atomizers inject individual samples using syringes or autosamplers. The most common discrete atomizer is the electrothermal atomizer.
Flame Photometry: Overview01:02

Flame Photometry: Overview

Flame photometry, also known as flame emission spectrometry, is a technique used for the qualitative and quantitative analysis of elements present in a sample using a flame as the source of excitation energy. The concept of flame photometry was realized in the early 1860s by Kirchhoff and Bunsen, who discovered that specific elements emit characteristic radiation when excited in flames. The first instrument developed for this purpose was used to measure sodium (Na) in plant ash using a Bunsen...
Flame Photometry: Lab01:16

Flame Photometry: Lab

In a flame photometer, when a solution like potassium chloride is aspirated into the flame, the solvent evaporates, leaving behind dehydrated salt. This salt dissociates into free gaseous atoms in their ground state. Some of these atoms absorb energy from the flame, leading to their excitation. The excited atoms return to the ground state, emitting photons at characteristic wavelengths. Because only electronic transitions are involved, the resulting emission lines are very narrow. The intensity...

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関連する実験動画

Updated: Jun 30, 2026

Bringing the Visible Universe into Focus with Robo-AO
10:35

Bringing the Visible Universe into Focus with Robo-AO

Published on: February 12, 2013

FAUST望遠鏡による天文観測

J Bixler1, S Bowyer, J M Deharveng

  • 1Department of Physics, University of California, Berkeley 94720, USA.

Science (New York, N.Y.)
|July 13, 1984
PubMed
まとめ
この要約は機械生成です。

遠紫外宇宙望遠鏡 (FAUST) は,シグナス・ループのような宇宙物体の広場画像を提供した. データ分析は,これらの紫外線観測を用いて熱い白矮星を探します.

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Simulating Imaging of Large Scale Radio Arrays on the Lunar Surface
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Simulating Imaging of Large Scale Radio Arrays on the Lunar Surface

Published on: July 30, 2020

関連する実験動画

Last Updated: Jun 30, 2026

Bringing the Visible Universe into Focus with Robo-AO
10:35

Bringing the Visible Universe into Focus with Robo-AO

Published on: February 12, 2013

Surface Mapping of Earth-like Exoplanets using Single Point Light Curves
06:48

Surface Mapping of Earth-like Exoplanets using Single Point Light Curves

Published on: May 10, 2020

Simulating Imaging of Large Scale Radio Arrays on the Lunar Surface
06:14

Simulating Imaging of Large Scale Radio Arrays on the Lunar Surface

Published on: July 30, 2020

科学分野:

  • 天文学と天体物理学について
  • 宇宙科学 スペースサイエンス
  • 紫外線天文学について

背景:

  • 遠紫外宇宙望遠鏡 (FAUST) のミッションは,広域画像を撮影することを目的とした.
  • 観測は1300から1800アンストームの波長範囲で行われました.

研究 の 目的:

  • 遠紫外線を用いて天体の画像を撮る.
  • 熱い白矮星を含む,さらなる天文学的研究のための潜在的な標的を特定する.

主な方法:

  • 画像撮影のためにSpacelab 1のFAUST機器を利用しました.
  • 紫外線曝露を分析するために加工された写真フィルム.

主要な成果:

  • ほとんどのフィルムには高い背景曝露があり,データの品質を制限しました.
  • 使用可能なフレームには,Cygnus Loop超新星残骸と銀河団Abell 2634.4の画像が含まれていました.

結論:

  • 背景の課題にもかかわらず,貴重なデータを取得できました.
  • 選択された曝露は,熱い白矮星の探求を容易にする.