Year On Earth

A year on earth is measured by one complete trip around the sun. Seems simple enough but there is a problem. The earth doesnt travel in a path around the sun that returns it to its starting point. So how do we know when the year starts or ends?

Category:

Science & Technology

Tags:

• earth
• sidereal
• year
• sun
• moon
• orbit
• constellation
• zodiac
• ecliptic
• star
• sky
• dawn
• Hemisphere
• North
• South
• Orion
• tropical
• axis
• analemma
• tilt
• winter
• summer
• solstice
• vernal
• autumnal
• equinox
• Polaris
• Thuban
• Draco
• Vega
• gravitational
• force
• season
• perihelion
• aphelion
• equator
• Nutation
• LuniSolar
• ellipse
• eccentricity
• apsidal
• Planetary
• Precession
• Obliquity
• anomalous

[eldiagrama]

Pffff. Ill have to rewatch this.

Also, It would be very nice to have a transcript of the video in the information.

[cassiopeiaproject]

@eldiagrama You can find transcripts to all our videos on our web site, just google cassiopeia project to find us.

[CogitoErgoCogitoSum]

Time stamp: 2:06. I never understood that analemma. You said "take a picture of the sun at noon". Is that noon mean solar time or is that noon apparent solar time? Perhaps you mean the sun at culmination? Really, when are these pictures actually taken?

[cassiopeiaproject]

@CogitoErgoCogitoSum Wherever you are, take a picture of the sun at noon every Tuesday for a year and superimpose them. The analemma for your latitude is the result.

[blacknwhite6969]

at about 6:20 that fun sound made me thought i was receiving a facebook message O_o

[Greeb17]

9:08 Best pickup line ever.

[786baqi]

This is read by a professional reader, not a teacher.

no transmission of understanding was passed, no meaning or modulation of understanding.

I can't understand something if the one who is transmitting it doesn't.

It had no soul.

[julioverne24]

somos mucha gente que nos interesa este tipo de videos, pero no entendemos ingles si hubiera alguien que nos los tradujera seria fantastico.

[jtmedina75]

I love science

[thenendo]

Ahhhhhh the narrator is constantly "up-talking". Every single sentence ends on a high pitch, and it really distracting once you notice it.

[baldclub]

Great job, had to rewind a few times but it's great stuff. I don't mind the narrator at all.

[Leon612]

Happy 2012! The Mayans are bums!

[WillBlocher]

Great vid! Ditch the narrator, though. He sounds like a minister giving his son the "birds and bees" talk.

[MsKoali]

See what a whole lot of people have done for us. And very quietly too. I love this.

[cloverfield911]

@Greeb17 ....if your Sheldon from the Big Bang Theory!!