Did you know that..........?
Options
Comments
-
Did you know that.....the speed of light is finite, it has an upper speed, this leads to some interesting facts.
Everything that your eye sees is in the past? Due to the time it takes for the source of light to reach your eyes. The moon is 3 light seconds away, so you see the moon as it was 3 seconds ago.....the sun as it was 8 mins ago, jupiter as it was half an hour ago.....our suns nearest neighbour proxima centari.....as it was 4 years ago.....the Andromeda galaxy our nearest galactic neighbour as it was 2M years ago....the furthest objects our telescopes can see .............the light from these objects left their source 13B years ago.....well before solar system was born........
-
Pete2 said:Did you know that.....the speed of light is finite, it has an upper speed, this leads to some interesting facts.
Everything that your eye sees is in the past? Due to the time it takes for the source of light to reach your eyes. The moon is 3 light seconds away, so you see the moon as it was 3 seconds ago.....the sun as it was 8 mins ago, jupiter as it was half an hour ago.....our suns nearest neighbour proxima centari.....as it was 4 years ago.....the Andromeda galaxy our nearest galactic neighbour as it was 2M years ago....the furthest objects our telescopes can see .............the light from these objects left their source 13B years ago.....well before solar system was born........
-
So true........but did you know that .......we have had radio and tv broadcasts now for over 60 years.....so if ET lived on a planet say over 60 light years away from earth our planet would now be glowing in the electro magnetic spectrum ......radio waves......and would be hearing sounds from the Ali Pally broadcasts.
-
Did you know that.......super glue was invented during the Nam war as a surgical aid? We now use it to stick things together, but it was used firstly by medics to stick together deep cuts. Thats why when you use it it sticks your fingers together rather than the object requiring being glued.
Brightness
Categories
- All Categories
- 13K Start here and say hello!
- 6.6K Coffee lounge
- 104 Games lounge
- 416 Cost of living
- 4.3K Disability rights and campaigning
- 1.9K Research and opportunities
- 199 Community updates
- 9.3K Talk about your situation
- 2.1K Children, parents, and families
- 1.6K Work and employment
- 776 Education
- 1.7K Housing and independent living
- 1.4K Aids, adaptations, and equipment
- 615 Dating, sex, and relationships
- 363 Exercise and accessible facilities
- 737 Transport and travel
- 31.5K Talk about money
- 4.3K Benefits and financial support
- 5.2K Employment and Support Allowance (ESA)
- 17.1K PIP, DLA, and AA
- 4.9K Universal Credit (UC)
- 6.3K Talk about your impairment
- 1.8K Cerebral palsy
- 868 Chronic pain and pain management
- 180 Physical and neurological impairments
- 1.1K Autism and neurodiversity
- 1.2K Mental health and wellbeing
- 319 Sensory impairments
- 824 Rare, invisible, and undiagnosed conditions