Their find shows that hot Jupiter<\/a> systems can shelter nearby small planets rather than always clearing them out.<\/p>\n Sprinting around WASP-132<\/p>\n The inner world, named super\u2011Earth WASP\u2011132 c<\/a>, skims only about 1.7 million miles from its star, closer than many low\u2011Earth satellites circle ours.<\/p>\n Despite the proximity, its measured bulk density of 5.5\u202fg\/cm\u00b3 hints at a largely rocky composition, slightly heavier than Earth<\/a> itself.<\/p>\n TESS space\u2011telescope<\/a> photometry reveals that each transit lasts just over one hour. Follow\u2011up spectra show a planetary mass roughly six times that of Earth, confirming its compact size.<\/p>\n \u201cThis is the first time we have observed such a configuration,\u201d said Dr. David Armstrong<\/a>, University of Warwick<\/a>, referring to a super\u2011Earth tucked inside a hot\u2011Jupiter system. <\/p>\n Armstrong\u2019s team supplied high\u2011cadence data with the HARPS spectrograph<\/a>, boosting the radial velocity<\/a> precision enough to isolate the tiny wobble of the 24\u2011hour world.<\/p>\n An icy giant in the dark<\/p>\n WASP\u2011132\u202fd<\/a>, the newly announced outer planet, orbits nearly 252 million miles out, about the distance from the Sun to the asteroid belt. <\/p>\n It tips the scale at 5.2 times Jupiter\u2019s mass and likely sports deep layers of methane\u2011rich clouds that never see direct starlight.<\/p>\n At such a distance the planet receives less than 1\u202fpercent of the light falling on Earth. Temperatures could hover hundreds of degrees below freezing, giving researchers a rare look at a young ice giant still cooling.<\/p>\n Because the orbit spans half a decade, astronomers relied on more than nine years of CORALIE spectrograph<\/a> data to trace its slow pull. <\/p>\n The long baseline also revealed a steady velocity trend that hints at yet another, unseen companion further out.<\/p>\n Finding WASP-132<\/p>\n Space\u2011based photometry from TESS and CHEOPS<\/a> provided crisp light curves, flagging potential planets. <\/p>\n Ground\u2011based spectra from HARPS and CORALIE then measured stellar wobble to pin down masses, a one\u2011two punch that has become routine for multiplanet hunts.<\/p>\n A multidimensional Gaussian\u2011process model<\/a> filtered out chromospheric activity<\/a> signals from starspots rotating every 31\u202fdays. Without that step the planet signatures would have drowned in stellar noise.<\/p>\n For the inner planet, the team measured a radial\u2011velocity amplitude of just 4.6\u202fft\/s, about walking speed, showcasing the reach of modern spectrographs. <\/p>\n The outer giant\u2019s tug, in contrast, registers at over 200\u202fft\/s, easy to spot once enough years of data accumulate.<\/p>\n Together the datasets produce a complete family portrait: a small rocky planet<\/a> at 0.018 AU, a seven\u2011day hot Jupiter originally found in 2017, and the distant icy behemoth at 2.71 AU. Such architectural detail lets theorists test how planets migrate after formation.<\/p>\n Lessons for planetary architects<\/p>\n Hot Jupiters<\/a> usually travel inward through high\u2011eccentricity interactions that scatter smaller worlds. Finding a close\u2011in rocky planet surviving next to one challenges that picture.<\/p>\n The team argues that WASP\u2011132\u202fb may have drifted quietly through the disk, leaving the inner super\u2011Earth<\/a> untouched and preserving a dynamically \u201ccool\u201d history. Its near\u2011circular orbit and moderate equatorial gravity support that calm evolution.<\/p>\n Fran\u00e7ois Bouchy<\/a> of UNIGE<\/a> called the system \u201ca remarkable laboratory for studying the formation and evolution of multi\u2011planetary systems.\u201d <\/p>\n He noted that mixing planet sizes and separations in one place lets models test where solid cores assemble and where gas envelopes inflate.<\/p>\n Interior modeling suggests the ice giant holds at least 17 Earth masses of heavy elements, while the inner planet is nearly bare of volatiles. <\/p>\n These contrasting chemistries likely reflect where each body accreted before migration reshuffled the deck.<\/p>\n Organic chemistry orbiting WASP-132<\/p>\n The discovery connects with current research in astrochemistry, which investigates how complex organic molecules develop on interstellar ice grains.<\/p>\n These molecules are considered important because they match those found in comets and asteroids.<\/p>\n When objects like these collide with planets, they can deliver both water and organic compounds. A distant ice giant such as WASP\u2011132\u202fd helps maintain the low temperatures needed for these molecules to survive in space.<\/p>\n By sampling the planet\u2019s atmosphere once it transits, as James Webb<\/a> could do if orbital alignments cooperate, scientists hope to detect the chemical fingerprints of that frozen chemistry. <\/p>\n Spectral clues to methane, ethane, or even more complex organics would connect planetary science with prebiotic chemistry.<\/p>\n Meanwhile, the rocky inner planet lies far too close for life as we know it; its dayside bakes at an estimated 1\u202f750\u00b0F. Yet its bulk density offers a laboratory for studying how silicate mantles and iron cores behave under extreme stellar radiation.<\/p>\n Where astronomers look next<\/p>\n Future Gaia data releases may detect the astrometric wobble of the ice giant, pinning its true mass and orbital tilt. Additional spectra could also reveal whether the outer trend is a brown dwarf or another planet.<\/p>\n The team has already secured ESPRESSO<\/a> time to measure spin\u2011orbit alignment during transits. If both planets share the star\u2019s equatorial plane, the quiet\u2011migration scenario gains weight.<\/p>\n Surveys are now re\u2011checking hot\u2011Jupiter hosts for hidden, fast\u2011orbiting companions like WASP\u2011132\u202fc. As technology drives radial\u2011velocity precision below three feet per second, many more \u201cday\u2011long year\u201d planets<\/a> may come to light.<\/p>\n Finding them will refine models of planetary system diversity and, by extension, the odds of habitable worlds. Each well\u2011characterized system moves the field from speculation toward statistical certainty.<\/p>\n The study is published in Astronomy & Astrophysics<\/a>.<\/p>\n Image credit: Thibaut Roger, Universit\u00e9 de Gen\u00e8ve.<\/p>\n \u2014\u2013<\/p>\n Like what you read? Subscribe to our newsletter<\/a> for engaging articles, exclusive content, and the latest updates.\u00a0<\/p>\n Check us out on EarthSnap<\/a>, a free app brought to you by Eric Ralls<\/a> and Earth.com.<\/p>\n \u2014\u2013<\/p>\n","protected":false},"excerpt":{"rendered":"A rocky planet zips around the faint orange star WASP-132 once every 24 hours and 17 minutes. 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