I wounder is it posible the we may have a earth like planet on the other side of the sun?

Question

could it be , maybe that there is another earth like planet on the other side of the sun about 93.000.000 miles distance from the sun on the far side to us that we never see, if so would our eliptical orbit of the sun make it so that at certain times of the year we would be able to see it for a while if it was there.

Answer 1

No, it is not possible. If it were there, it would be known by its gravitational interaction with other Solar System bodies. Furthermore, the probes that we have sent to Venus, Mars, and the Sun would never have reached their destinations if the inner Solar System contained a second Earth mass object. Finally, the precise opposition of Earth and a "counter-Earth" would be a short-lived phenomenon due to ordinary random variation in orbits, and it would soon become visible during some portion of the orbit.

Answer 2

Sorry folks but you are wrong about LaGrange Points. The main thing to grasp is that for it to be stable, the third body (eg the counter-earth) must be a much smaller mass than the main body it accompanies in orbit.

Thus it is not possible that there is a body the size of the Earth 180 degrees round our orbit (the L3 Lagrange point) but it is possible there could be one a lot smaller than the Earth (we know there isn't as probes have looked) at the L3 point. It is similarly perfectly possible there could be a counter-Jupiter at Jupiter's L3 point that was the size of the Earth. as the Earth is so much smaller than Jupiter.

There are five LaGrange points. The two most commonly occupied are the L4 and L5 points which are 60 degrees ahead and 60 degrees behind the main orbiting body (and Jupiter had a clutch of Trojan asteroids at its L4 and L5 points), Two of Saturn's larger moons have a pair of smaller moons at their L4 and L5 points in their orbits around Saturn.

The two large moons are Tethys and Dione (both discovered in the 17th Century by the astonomer Cassini), Tethys has two tiny co-orbitals Telesto and Calypso, and Dione has also got two, Helene and Polydeuces. All four of these mini-moons orbit in the larger moons' L4 and L5 LaGrangian points, one in each point.

The L4 and L5 points are 120 degrees from one another but only 60 degrees from the main orbiting body. See the link for a diagram of where the 5 LaGrange Points are;

The Sun–Earth L3 point was a popular place to put a "Counter-Earth" in pulp science fiction and comic books - though of course, once space based observation was possible via satellites and probes, it was shown to hold no such object.

The Sun–Earth L1 is ideal for making observations of the Sun. Objects here are never shadowed by the Earth or the Moon. The Solar and Heliospheric Observatory (SOHO) is stationed in a Halo orbit at the L1 and the Advanced Composition Explorer (ACE) is in a Lissajous orbit, also at the L1 point. The Earth–Moon L1 allows easy access to lunar and earth orbits with minimal delta-v, and would be ideal for a half-way manned space station intended to help transport cargo and personnel to the Moon and back.


L2
The L2 point lies on the line defined by the two large masses, beyond the smaller of the two.

Example: On the side of the Earth away from the Sun, the orbital period of an object would normally be greater than that of the Earth. The extra pull of the Earth's gravity decreases the orbital period of the object, and at the L2 point that orbital period becomes equal to the Earth's.

Sun–Earth L2 is a good spot for space-based observatories. Because an object around L2 will maintain the same orientation with respect to the Sun and Earth, shielding and calibration are much simpler. The Wilkinson Microwave Anisotropy Probe is already in orbit around the Sun–Earth L2. The future Herschel Space Observatory as well as the proposed James Webb Space Telescope will be placed at the Sun–Earth L2.

Earth–Moon L2 would be a good location for a communications satellite covering the far side of the Moon.

There are no known large bodies in the Sun–Earth system's Trojan points, but clouds of dust surrounding the L4 and L5 points were discovered in the 1950s. Clouds of dust, called Kordylewski clouds, even fainter than the notoriously weak gegenschein, are also present in the L4 and L5 of the Earth–Moon system.

Answer 3

No. The orbital mechanics would be wrong. It would be concievable to have another planet 120 degrees from us in the same orbit, but not 180 degrees. At 180 the distance between the two wouldn't be stable.

Answer 4

No. There is nothing there. Remember that NASA en the European Space Agency have launched a variety of spacecrafts to Mercury, Venus, Mars, Jupiter, Saturn, Uranus and Neptune. All of these spacecrafts have used gravitational assistance from all planets of the solar system and all took into consideration that there is no planet in the other side of our orbit. And there are a lot of nice photographs of our planet from many many kilometers away, is there is something there we could have seen it, don't you think?

Answer 5

No the orbits of the planets are affected by each others gravity, albeit subtly. Another earth sized planet would betray it's presence by subtle but measurable alterations of venus' and mars' orbits.

Answer 6

No there is no way that that can happen. Our solar system is very well known by now. And our calculations on how it works are accurate.

Answer 7

No chance.