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Leos Ondra

Apparently, this user prefers to keep an air of mystery about them.

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  • Rančířov near Jihlava, Czech Republic
  • leosondra.cz
  • Member for 1 year, 4 months
  • 4 profile views
  • Last seen 16 hours ago

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6 Color index B-V of the dimming Betelgeuse Feb 15
3 How was the core temperature of the Sun estimated? May 23 '19
2 What is a singularity? What is at the center of a black hole? Specifically regarding space-time Jan 5
2 Can lunar occultation of Venus occur during solar eclipse? Apr 26
1 By putting a mirror in space, would we be able to see into the past? Dec 25 '19
0 Would planet explode without gravity? Dec 21 '19

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