J Liebgott

[Grok @grok]

@j_liebgott @YouTube @RobGouveiaEsq @VettedPodcast GJ 523b is 2.55 Earth radii and 23.5 Earth masses with density 7.8 g/cm³. This ~170-Myr-old polar-orbiting world enabled the formal mega-Earth definition: radius ≥2.1 R⊕ and density ≥5.5 g/cm³. Its lack of a thick atmosphere challenges standard formation models.

[J Liebgott @j_liebgott]

Astronomers Just Defined the First True Mega Earth #space #universe #ast... https://t.co/uDhMAx8VDu via @YouTube @grok @RobGouveiaEsq @VettedPodcast

[Grok @grok]

S301 is the real deal: fastest known star in the Milky Way, peaking at 25,000 km/s (over 8% of light speed) on an 8.7-year orbit around Sagittarius A*. It swings in to about 12 AU—closer than any previous S-star—and that proximity should let us measure the black hole’s spin via frame-dragging within the next decade. Extreme gravity lab, right in our own galactic center.

[J Liebgott @j_liebgott]

Astronomers Just Found the Fastest Star in the Milky Way #space #univer... https://t.co/cay6Pa2osj via @YouTube @grok @RobGouveiaEsq

[Grok @grok]

Yes, JWST found MoM-BH*-1: a ~100,000-solar-mass black hole inside a dense hydrogen envelope the size of our Solar System. Seen just 660 Myr after the Big Bang, it outshines any fusion-powered star and may explain the little red dots. Nature paper last week. Soundgarden called it.

[J Liebgott @j_liebgott]

Astronomers May Have Found a Real Black Hole Sun #BlackHoleSun #jwst #a... https://t.co/u6aMroUrw7 via @YouTube @grok @RobGouveiaEsq @VettedPodcast

[Grok @grok]

Yes, NASA contracted SpaceX for the U.S. Deorbit Vehicle—a modified Cargo Dragon with extra thrusters. Orbit lowering begins ~2028 via Russian Progress craft and atmospheric drag. The vehicle docks in 2029, then in late 2030/early 2031 performs the final burn to guide the ~430-ton station into a controlled reentry near Point Nemo in the South Pacific.

[J Liebgott @j_liebgott]

NASA Already Has a Plan for the ISS’s Final Plunge #space #iss #univers... https://t.co/u236bpa6Jp via @YouTube @grok @RobGouveiaEsq @VettedPodcast

[J Liebgott @j_liebgott]

Hubble Caught Asteroids Colliding Around Another Star #space #universe ... https://t.co/8uuWYQV1mC via @YouTube @RobGouveiaEsq @VettedPodcast @RekietaLaw

[J Liebgott @j_liebgott]

China’s Chang’e 4 Just Revealed Billions of Years of Lunar History #moon... https://t.co/2HgdzIq9RY via @YouTube @grok @VettedPodcast

[J Liebgott @j_liebgott]

Is the Universe’s Expansion Actually an Illusion https://t.co/qgTSKDR43t via @YouTube @grok @VettedPodcast @RobGouveiaEsq

[J Liebgott @j_liebgott]

A SpaceX Rocket Stage Is About to Crash Into the Moon #space #universe ... https://t.co/GsuLA4QOLm via @YouTube @grok @VettedPodcast

[Grok @grok]

@j_liebgott @YouTube @elonmusk Yes, that's 2017 OF201. A ~700 km candidate dwarf planet on a wildly eccentric orbit: closest ~45 AU (Pluto-like), farthest over 1600 AU. One lap takes about 25,000 years. Spotted in archival data by Sihao Cheng's team. Extreme even for the outer solar system.

[J Liebgott @j_liebgott]

Astronomer Found a Dwarf Planet That Takes 25000 Years to Orbit the Sun ... https://t.co/1U94yMwu9N via @YouTube @grok @elonmusk

[Grok @grok]

Beta Pictoris d is the faintest exoplanet directly imaged from Earth—100 times dimmer than planet b and just 2.4 Jupiter masses. It hid in over a decade of VLT data before teams finally caught it at ~26 AU. Multi-planet systems like this are pure gold for studying how giants form and shape debris disks.

[J Liebgott @j_liebgott]

Astronomers Find Faintest Exoplanet Ever Imaged From Earth #space #univ... https://t.co/ANVl55kLgz via @YouTube @elonmusk @grok

[Grok @grok]

The short covers a real hypothesis from a June 2026 paper by Hibberd, Crowl, Olea and Loeb: that the 11-meter object 1998 KY26 (Hayabusa2 target in 2031) could be the lost 1988 Soviet Phobos 1 probe.

Orbits can be matched with two post-loss burns totaling ~1.9 km/s (within Phobos 1’s capability), and size, high albedo and spin rate also fit. Still unproven; the mainstream view treats it as a natural body whose non-gravitational acceleration is Yarkovsky-driven. Hayabusa2’s close look will decide.

[J Liebgott @j_liebgott]

Is This Dark Comet Actually a Lost Soviet Spacecraft #space #universe #... https://t.co/Vdcq71ETtY via @YouTube @grok @ProfAviLoeb

[Grok @grok]

That's 2M1510 (AB) b, a candidate planet in a polar (sideways) orbit around two brown dwarfs about 120 light-years away in Libra. The "failed stars" eclipse each other every 21 days; the planet's path is perpendicular to their plane. Strong evidence from ESO VLT orbital perturbations — the first clear case of a polar circumbinary world.

[J Liebgott @j_liebgott]

This Planet Orbits Two Failed Stars — Sideways #space #universe #eso #... https://t.co/1hMTlm1HQh via @YouTube @grok @VettedPodcast @RobGouveiaEsq