Planet Hunters TESS has announced the discovery of 2 gaseous planets (HD 152843b & HD 152843c) orbiting around a bright Sun-like star named HD 152843.

Artist’s impression of two gas giants (HD 152843b & c) in orbit around a bright Sun-like star
HD 152843. (Image credit: NASA/Scott Wiessinger)

Planet Hunters is a NASA funded citizen science project that looks for extrasolar planets using human eyes. It allows volunteers from public to collaborate with professional astronomers, and analyze data from the Kepler space telescope and the TESS.

Planet Hunters TESS uses data collected by NASA’s Transiting Exoplanet Survey Satellite (TESS). The project works on the fact that humans are better at finding visual patterns than computer models.

Now, Planet Hunters TESS has announced the…


Dubbed Valparaiso 1, this open cluster contains at least fifteen thousand stars. It is about 75 million years old.

Valparaiso 1 is located at about 7,000 light-years away in the constellation of Scutum.
(Image credit: Gabriel Perez Diaz, SMM & IAC)

An international team (of scientists) has discovered a massive star cluster of intermediate age in the direction of the Scutum constellation. The cluster lurks at relatively short distance of seven thousand light-years away from our Sun.

Dubbed Valparaiso 1, this open cluster contains at least fifteen thousand stars, and it is about 75 million years old.

An open cluster is a group of stars which were all born together from the same molecular cloud of dust and gas. They move together…


The newly detected circumbinary planet is called TIC 172900988b, and it is slightly bigger than Jupiter.

An artist’s impression of exoplanet TOI 133b, orbiting two stars. (Image credit: NASA’s Goddard Space Flight Center/Chris Smith)

Recently, a team of international scientists reported the first discovery of a transiting circumbinary exoplanet found from a single sector of TESS data. Their study, submitted on 18 May 2021 can be read here.

The exoplanets that orbit two stars instead of one are called circumbinary planets. The first confirmed circumbinary planet was found circling a binary star system called PSR B1620–26, and was first reported in 1993. The system is located at about 12,400 light-years away in the globular cluster of Messier 4…


Just to avoid confusion, this new found galaxy called BRI 1335–0417 is the oldest known “spiral” galaxy, not the oldest galaxy ever observed.

This ALMA image of the galaxy BRI 1335–0417 shows its two spiral arms, visible on both sides of the compact, bright area in the centre. (Image credit: ALMA (ESO/NAOJ/NRAO), T. Tsukui & S. Iguchi)

With the help of ALMA (Atacama Large Millimeter/submillimeter Array), scientists have discovered the oldest known spiral galaxy designated BRI 1335–0417.

Located in the Atacama Desert of northern Chile, ALMA is a radio telescope comprising 66 high-precision antennas, spread over distances of up to sixteen kilometres.

The telescope observes electromagnetic radiation at millimeter/submillimeter wavelengths. ALMA is operated by European Southern Observatory (ESO), along with its international partners.

While analysing data collected by ALMA, scientists spotted the two-armed…


Two separate teams have reported the discovery of heavy metal vapours in the atmospheres of comets in and beyond our Solar System.

Comet NEOWISE seen from Rio Rancho in New Mexico, USA (Image credit: Ganapathy Kumar @Unspalsh.com)

In an unexpected turn of events, two separate teams (of scientists) have reported the discovery of heavy metal vapours in the atmospheres of comets in and beyond our Solar System.

The first study was lead by Jean Manfroid from the University of Liège, Belgium. While analysing the data collected by European Southern Observatory’s (ESO) Very Large Telescope (VLT), team found the presence of nickel and iron in the atmospheres of comets that are bound to our Sun.

The…


Rare long-period comets with orbital period less than 4,000 years can cause meteor showers on Earth.

Orbit of a long-period comet. (Image credit: National Astronomical Observatory of Japan (NOAJ))

Comets are just a small fraction of all Earth impactors combined, but they are believed to have rocked Earth with some of the greatest impact events over the planet’s history. That’s because they are huge, and their orbits are such that they can collide at high speeds.

Comets are the celestial bodies made up of frozen gases, rocks and dust that orbit the Sun. When a comet, while approaching Sun, comes close to it, the ice on its surface starts to sublimate- a process…


Located about 16,000 light-years from Earth, the newly discovered red giant star is designated SPLUS J210428.01−004934.2 (SPLUS J2104−0049).

Supergiant Rigel- a Population I star with reflection nebula IC 2118 in Eridanus

At a distance of about 16,000 light-years from Earth, astronomers have detected a new ultra-metal-poor (UMP) star. The star was discovered as part of the Southern Photometric Local Universe Survey (S-PLUS).

This newly discovered red giant star has been named SPLUS J210428.01−004934.2 (or SPLUS J2104−0049 in short).

The star has a mass of about 0.8 solar masses, and its effective temperature is estimated to be around 4,700 degrees Celsius. Also, the Star’s low metallicity level (-0.4) …


The exoplanet TOI-220 b is about three times larger and 13.8 times more massive than Earth.

Artist’s impression of an exoplanet

About 290 light-years away from us in the constellation of Pictor, lies a bright (V=10.4) and old (10.1±1.4 Gyr) K-type dwarf star called TOI-220.

Recently, with the help of NASA’s TESS and ESO’s La Silla Observatory, a team of astronomers reported the discovery of a warm sub-Neptune orbiting TOI-220. The newly discovered exoplanet has been named TOI-220 b.

The transit signals of TOI-220 b were first identified by NASA’s TESS. Further, the planetary nature of the signals were confirmed by performing radial velocity observations…


The newly discovered sub-Neptune extrasolar planet is designated TOI-269 b.

Artist’s impression of an extrasolar palnet. (Image credit: goodfon.com/space)

About 186 light-years from Earth, lies an M dwarf star called TOI-269 or TIC 220479565. The star has a spectral type of M2V.

The estimates of radius and mass of TOI-269 are approximately 0.4 solar radii and 0.39 solar masses. It has an effective temperature of about 3200 degrees Celsius, whereas its metallicity level is around -0.29.

While observing TOI-269 between September 2018 and July 2019, NASA’s Transiting Exoplanet Survey Satellite (TESS) identified a transit signal in its light curve.

US space agency NASA’s TESS is busy surveying about 200,000…


Voyager 1’s Plasma Wave System (PWS) instrument has detected an extremely weak but persistent “hum” of plasma waves in the interstellar medium (ISM).

The Voyagers: Reaching for the stars. This poster was released by NASA to mark the spirit of space exploration undertaken by both the probes. (Image credits: NASA/JPL-Caltech)

Voyager 1 spacecraft was launched by US space agency National Aeronautics and Space Administration (NASA) on 5 September 1977, sixteen days after its twin Voyager 2.

Both the probes were launched as part of the NASA’s Voyager program to explore the outer Solar System. Voyager 1 flew by gas giant Jupiter in 1979 and then ringed planet Saturn in late 1980.

On 25 August 2012, Voyager 1 became the first human-made probe to cross the heliopause- a…

Absolute Cosmos

The Cosmos is all that is or ever was or ever will be…

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