Hot Jupiter

... are close to it.

Um, and yeah, we found, like, um, these weird planets, hot Jupiters that we didn't expect to exist.

In fact, my PhD advisor, um, tells me that when he first heard about the detection of 51 Peg b, which was the, the first, um, planet announced, um, he originally thought, um, it, it has an orbital period of five days.

He originally thought somebody said 500 days, and he thought that was absurd.

This one comes with a deadline.

Published on the 18th of September in the publications of the Astronomical Society of Japan from Noriharu Watanabe and Norio Narita at the University of Tokyo with a large international team, the discovery of TOI-1355b, a hot Jupiter and a strange one on three counts.

Count one is the star.

TOI-1355 is an A-type star about twice the sun's mass with a surface near 8,700 Kelvin, some 3,000 degrees hotter than the sun.

But its orbit is not a circle.

The eccentricity is about 0.22, a properly lopsided orbit.

Why is that surprising for a hot Jupiter?

Because they're almost never lopsided.

How do they resemble our own? How are they different? How common are other planets and other types of planets out there which look nothing like the ones in our own solar system? Put simply, it was and continues to be a project of sheer curiosity about other worlds.

And how enriching that journey has been, revealing planets in unexpected places like dead stars, giant stars and binary stars, as well as diverse flavours like super earths, hot Jupiters, mini Neptunes, lava worlds and ultra eccentric planets.

So why look for exomoons? It is not to merely confirm their existence, but rather it is to reveal the rich treasures which they will surely reveal to us.

The moons in our own solar system are already staggeringly diverse.

But exoplanets just blew all of those expectations out of the window.

The Copernican principle was broken.

Hot Jupiters most famously exemplify this, because back then, essentially no theories predicted their existence, and still today, they remain a puzzling phenomena to explain.

And in the same way, exomoons hold enormous promise to teach us how satellites form.

It was to justify observation, like I said-

Hot Jupiters, yeah

... like Mars, Mars is too small and things.

And also-