Changes

|albedo=0.41<ref name=neptunefact/>

|albedo=0.41<ref name=neptunefact/>

|mfd=0.142 G (1.42 * 10^-5 T)<ref name=neptunefact/>

|mfd=0.142 G (1.42 * 10^-5 T)<ref name=neptunefact/>

|pmdm=1.5 * 10²⁴ N-m/T<ref name=Humphreys2>Humphreys, D. R. "[http://www.icr.org/index.php?module=articles&action=view&page=329 Beyond Neptune: Voyager II Supports Creation]." [[Institute for Creation Research]]. Accessed April 30, 2008</ref>

|pmdm=1.5 * 10²⁴ N-m/T<ref name=Humphreys2>Humphreys, D. R. "[https://www.icr.org/index.php?module=articles&action=view&page=329 Beyond Neptune: Voyager II Supports Creation]." [[Institute for Creation Research]]. Accessed April 30, 2008</ref>

|cmdm=2.42 * 10²⁵ N-m/T<ref name=Humphreys>Humphreys, D. R. "[http://www.creationresearch.org/crsq/articles/21/21_3/21_3.html The Creation of Planetary Magnetic Fields]." ''[[Creation Research Society Quarterly]]'' 21(3), December 1984. Accessed April 29, 2008.</ref>

|cmdm=2.42 * 10²⁵ N-m/T<ref name=Humphreys>Humphreys, D. R. "[http://www.creationresearch.org/crsq/articles/21/21_3/21_3.html The Creation of Planetary Magnetic Fields]." ''[[Creation Research Society Quarterly]]'' 21(3), December 1984. Accessed April 29, 2008.</ref>

|mdt=2200 a<ref name=calc>Calculated from observed present magnetic dipole moment and expected magnetic dipole moment at creation.</ref>

|mdt=2200 a<ref name=calc>Calculated from observed present magnetic dipole moment and expected magnetic dipole moment at creation.</ref>

Of course, the time allotted for the formation of the [[solar system]] is generally taken to be the alloted age of the [[Earth]]. The problem is that Uranus and Neptune would require more than twice the supposed age of the earth to accrete their present masses. In theory, the solar system could be older than the earth itself, but not much older. The solar system has other bodies in it that are much "younger." Nor does the above account for the [[young solar system evidence|body of evidence]] that the solar system is in fact quite young.

Of course, the time allotted for the formation of the [[solar system]] is generally taken to be the alloted age of the [[Earth]]. The problem is that Uranus and Neptune would require more than twice the supposed age of the earth to accrete their present masses. In theory, the solar system could be older than the earth itself, but not much older. The solar system has other bodies in it that are much "younger." Nor does the above account for the [[young solar system evidence|body of evidence]] that the solar system is in fact quite young.

Boss, in 2002, suggested reviving the old disk-instability hypothesis of planet formation, in which Uranus and Neptune formed through gravitational instability in a gaseous protoplanetary disk, after which a passing star blasted away much of the gaseous envelopes of the two worlds, leaving them much as they are today.<ref name=Boss>Boss, Alan P. "[http://www.sciencedirect.com/science?_ob=ArticleURL&_udi=B6V61-46SVX4B-1&_user=10&_rdoc=1&_fmt=&_orig=search&_sort=d&view=c&_acct=C000050221&_version=1&_urlVersion=0&_userid=10&md5=8356c9b57117437b185f44aca5ae71d0 Formation of gas and ice-giant planets]." ''Earth and Planetary Science Letters'' 202(3-4):513-523, September 30, 2002. {{doi|10.1016/S0012-821X(02)00808-7}} Accessed May 7, 2008.</ref> Thommes ''et al.'' suggested another theory: that Uranus and Neptune formed at the same general distance from the Sun as [[Jupiter]] and [[Saturn]] and then ''migrated'' to their present orbits.<ref name=Thommes>Thommes, Edward W., Duncan, Martin J., and Levison, Harold F. "[http://arxiv.org/abs/astro-ph/0111290 The formation of Uranus and Neptune among Jupiter and Saturn]." ''Astron. J.'' 123:2862, 2002. {{arXiv|astro-ph/0111290v1|pdf}} Accessed May 7, 2008.</ref>

Boss, in 2002, suggested reviving the old disk-instability hypothesis of planet formation, in which Uranus and Neptune formed through gravitational instability in a gaseous protoplanetary disk, after which a passing star blasted away much of the gaseous envelopes of the two worlds, leaving them much as they are today.<ref name=Boss>Boss, Alan P. "[http://www.sciencedirect.com/science?_ob=ArticleURL&_udi=B6V61-46SVX4B-1&_user=10&_rdoc=1&_fmt=&_orig=search&_sort=d&view=c&_acct=C000050221&_version=1&_urlVersion=0&_userid=10&md5=8356c9b57117437b185f44aca5ae71d0 Formation of gas and ice-giant planets]." ''Earth and Planetary Science Letters'' 202(3-4):513-523, September 30, 2002. {{doi|10.1016/S0012-821X(02)00808-7}} Accessed May 7, 2008.</ref> Thommes ''et al.'' suggested another theory: that Uranus and Neptune formed at the same general distance from the Sun as [[Jupiter]] and [[Saturn]] and then ''migrated'' to their present orbits.<ref name=Thommes>Thommes, Edward W., Duncan, Martin J., and Levison, Harold F. "[https://arxiv.org/abs/astro-ph/0111290 The formation of Uranus and Neptune among Jupiter and Saturn]." ''Astron. J.'' 123:2862, 2002. {{arXiv|astro-ph/0111290v1|pdf}} Accessed May 7, 2008.</ref>

Desch,<ref name=Desch>Desch, S. J. "[http://eagle.la.asu.edu/desch/papers/2007/Desch2007.pdf Mass Distribution and Planet Formation in the Solar Nebula]." Arizona State University, September 21, 2007. Accessed April 29, 2008.</ref> on the other hand, supports a radical alteration of the nebula hypothesis that calls for a ''decretion'' disk, not an accretion disk. But even his model requires that Uranus and Neptune ''exchange places'' early in the process, primarily because Neptune, though about 10 AU further out from the Sun than is Uranus, is yet more massive.

Desch,<ref name=Desch>Desch, S. J. "[http://eagle.la.asu.edu/desch/papers/2007/Desch2007.pdf Mass Distribution and Planet Formation in the Solar Nebula]." Arizona State University, September 21, 2007. Accessed April 29, 2008.</ref> on the other hand, supports a radical alteration of the nebula hypothesis that calls for a ''decretion'' disk, not an accretion disk. But even his model requires that Uranus and Neptune ''exchange places'' early in the process, primarily because Neptune, though about 10 AU further out from the Sun than is Uranus, is yet more massive.