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OGLE-2016-BLG-1190Lb is the first exoplanet discovered by microlensing with the Spitzer space telescope and the first exoplanet discovered lying near the planet/brown dwarf boundary. [ 1 ] [ 3 ] In addition, the discovery "is likely to be the first Spitzer microlensing planet in the Galactic bulge/bar," according to the initial reported study.
He has been referred to by himself and by others as the man who "killed Pluto", [3] [4] [5] because he furthered Pluto's being downgraded to a dwarf planet in the aftermath of his discovery of Eris and several other probable trans-Neptunian dwarf planets. He is the author of How I Killed Pluto and Why It Had It Coming, published in 2010.
In 2020, he discovered the ultrafaint dwarf galaxy named Pisces VII/Triangulum III [6] [7] which turned out to be a strong satellite candidate of the dwarf spiral galaxy Messier 33. [8] [9] Pisces VII is the first Local Group galaxy to be discovered by a non-professional astronomer. [10] [11] Donatiello II dwarf galaxy imaged by the Hubble ...
The timeline of discovery of Solar System planets and their natural satellites charts the progress of the discovery of new bodies over history. Each object is listed in chronological order of its discovery (multiple dates occur when the moments of imaging, observation, and publication differ), identified through its various designations (including temporary and permanent schemes), and the ...
Eris (minor-planet designation: 136199 Eris) is the most massive and second-largest known dwarf planet in the Solar System. [22] It is a trans-Neptunian object (TNO) in the scattered disk and has a high-eccentricity orbit. Eris was discovered in January 2005 by a Palomar Observatory–based team led by Mike Brown and verified
A Belgian-led team made the discovery using both space- and ground-based telescopes, spotting the planets as they passed in front of the red dwarf star known as TRAPPIST-1.
This size range is considered to be large enough such that the body can collapse into a spheroidal shape, and thus be a dwarf planet. [10] [24] Astronomer Michael Brown considers 2018 VG 18 to be highly likely a dwarf planet, based on his size estimate of 656 km (408 mi) calculated from an albedo of 0.12 and an absolute magnitude of 3.9. [10]
The newly-found ETNO joins Sedna, a dwarf planet believed to be about 250 AU from the sun, as objects residing outside the Kuiper Belt, where Pluto resides, according to Space.