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  2. White House COVID-19 outbreak - Wikipedia

    en.wikipedia.org/wiki/White_House_COVID-19_outbreak

    A 72-hour timeline would suggest that Trump actually knew he had the infection on September 30, but proceeded with his plans for a public rally that evening and a fundraiser on October 1. [160] Conley later clarified that he had meant "day three" instead of "72 hours", referring to the then-current time of Saturday morning compared to the ...

  3. Gamma-ray burst - Wikipedia

    en.wikipedia.org/wiki/Gamma-ray_burst

    Events with a duration of less than about two seconds are classified as short gamma-ray bursts. These account for about 30% of gamma-ray bursts, but until 2005, no afterglow had been successfully detected from any short event and little was known about their origins. [67]

  4. Cathode-ray tube - Wikipedia

    en.wikipedia.org/wiki/Cathode-ray_tube

    A cathode-ray tube (CRT) is a vacuum tube containing one or more electron guns, which emit electron beams that are manipulated to display images on a phosphorescent screen. [2] The images may represent electrical waveforms on an oscilloscope , a frame of video on an analog television set (TV), digital raster graphics on a computer monitor , or ...

  5. List of gamma-ray bursts - Wikipedia

    en.wikipedia.org/wiki/List_of_gamma-ray_bursts

    z = 0.695 [Ref 1] BeppoSAX: First X-ray afterglow, first optical afterglow GRB 970402: RA 14 h 50.1 m Dec −69° 20′ BeppoSAX: From an X-ray source never seen before in the constellation Circinus. [Ref 2] GRB 970508: z = 0.835: BeppoSAX: First redshift, first radio afterglow GRB 971214: z = 3.4: BATSE: The first GRB at z > 1; the most ...

  6. Mars One - Wikipedia

    en.wikipedia.org/wiki/Mars_One

    Mars One states that "income from donations and merchandise have not been used to pay salaries". To date, no financial records have been released for public viewing. [84] Mars One initially estimated a one-way trip, excluding the cost of maintaining four astronauts on Mars until they die, at US$6 billion. [85]

  7. Phase-out of incandescent light bulbs - Wikipedia

    en.wikipedia.org/wiki/Phase-out_of_incandescent...

    According to this source, 1 November 2011 to 30 September 2012 will be a transitional period and as of 1 October 2012, imports and sales of ordinary incandescent bulbs of 100 watts or more will be prohibited. The first phase will be followed by a ban on 60-watt-and-higher incandescent light bulbs starting in October 2014.

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