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Originally posted by holyTerror
Did anyone else notice the object dart across the screen around :30?
I'm sure it was a plane or bird or something, but it was moving pretty fast...
But Jupiter is a big planet, 140,000 km (86,000 miles) across, almost 11 times wider than the Earth! It’s also a whitish color, so it reflects a lot of sunlight. Its size, reflectivity, and close distance together make it a very bright object in the sky. If you go outside any time after sunset tonight you’ll see it in the east, a luminous beacon glowing brilliantly.
However, some people have been saying that tonight is the best night to see it, and we won’t get a chance to see it like this again for years. Shades of the Mars Hoax! In reality, it doesn’t matter if you go out tonight, or wait a few days. While technically Jupiter is closest right now, it’s not like it’ll be a lot farther away tomorrow night. Here’s why.
Jupiter takes about 12 years to go around the Sun, while Earth takes one. So we can assume Jupiter isn’t moving at all for the moment. If Jupiter, the Earth, and the Sun all lie on a line tonight, then tomorrow night Earth will have moved a little bit off that line (so will Jupiter, but much less). Using a little trig, I was able to figure out that the distance the Earth has moved away from Jupiter in one day is about 23,000 km (14,000 miles).
That’s not a whole lot compared to Jupiter’s vast distance. Adding an additional 23,000 km is really a piddly amount. Even with a big telescope it would be almost impossible to measure any difference!
Originally posted by Bosb33r
The equipment i use is a Celestron Nexstar 8" some good eyepieces and a pocket Camera from Casio, i film through the eyepiece (Eyepiece projection)
Originally posted by Darkeligos
I knew I saw some of Jupiter's moons last night! I was wondering why there were 2-4 lights around it at first but then wow.
Possible sightings thus seem restricted to Ganymede and Callisto. The former is the brightest satellite in the system and can reach an elongation almost as great as the separation of the easy naked-eye double star Alpha Capricorni (380 seconds). Though Callisto is the faintest of the Galilean moons, it can move as far as 10 minutes of arc From Jupiter. Why then are sightings so rare and so difficult? The answer, of course, lies in the aberrations of the eye. which cause the brilliant planet to display spikes and flares that hide the moons. But eyes differ greatly in the amount of spurious flares seen when a bright point source is viewed.
Originally posted by ngchunter
Here's the link for a live view of Jupiter from my scope right now:
www.ustream.tv...
Originally posted by holyTerror
Did anyone else notice the object dart across the screen around :30?
I'm sure it was a plane or bird or something, but it was moving pretty fast...
Originally posted by Ahmose
...maybe if you have really, really great binoculars, made for astronomy...]