Researchers at the South African Astronomical Observatory, in cooperation with others from around the world, have found a new exoplanet orbiting a star 320 light years away. The planet, called KELT-11b, is a gas giant similar to Jupiter and Saturn.
However, KELT-11b is very different from the gas giants in our solar system. The new exoplanet orbits its host star – called KELT-11 – so closely that it completes an orbit in less than five days. KELT-11b has only a fifth of Jupiter’s mass, but is 40% larger in radius. This means that this new bloated planet has about the same density as styrofoam!
This puffed up planet also has a very large atmosphere, providing researchers the opportunity to study its atmospheric properties in detail. These studies will be useful for developing tools to assess Earth-like planets for signs of life in future.
The KELT (Kilodegree Extremely Little Telescope) project consists of two small, robotic telescopes. One of the telescopes, KELT-North, is located in Arizona in the USA while the other telescope, KELT-South, is located in Sutherland, South Africa. The exoplanet was first discovered with the KELT-South telescope and thereafter monitored by many telescopes around the world operated by researchers at universities as well as telescopes operated by amateur astronomers.
The KELT telescopes scan the sky every night, measuring the brightness of about five million stars. Astronomers search for stars that seem to dim slightly at regular intervals, which can indicate a planet is orbiting that star and eclipsing it. Much larger telescopes are then used to measure the gravitational “wobble” of the star – the slight tug a planet exerts on the star as it orbits – to verify that the dimming is due to a planet, and to measure the planet’s mass.
Dr. Rudi Kuhn of SAAO, who helped in the construction of KELT-South, had this to say: ”This is a very exciting discovery. The planet KELT-11b orbits one of the brightest stars known to host an exoplanet and is one of the most inflated planets ever discovered. This enables us to make some very detailed observations of the atmospheric composition of the exoplanet using much larger telescopes, like the Southern African Large Telescope (SALT). This will help us understand how these giant planets are formed, why they have such small orbits as well as what might happen to them in the future.”
Win a Poster Heater with Gadget and Takealot.com
This winter Gadget and Takealot.com are giving away three Poster Heaters, which look like posters but become heaters when you plug them in.
Three Gadget readers will each win a unit, valued at R550 each. To enter, follow @GadgetZA and @Takealot on Twitter and tell us on the @GadgetZA account how many Watts the heater consumes.
What’s the big deal about these heaters? Many of us are struggling to keep the balance between soaring electricity costs and the need to keep warm this winter.
However, the recently launched Poster Heater by EasyHeat and distributed in South Africa by Takealot.com is not only one of the most cost effective electric heaters currently on the market, it is also easy to setup and use.
As the name indicates, it is a poster similar to one you would hang on a wall. But, plug it in and it turns into a 300 Watt heater. The Poster Heater isn’t designed to heat hallways or large rooms, but rather smaller ones like a bedroom or a baby’s nursery or a dressing room.
It uses radiant heating, which means that it heats up in a couple of minutes and the heat is directed at the objects or people around it, quickly taking the chill out of the air and providing a comfortable ambient temperature.
The other advantage of radiant heating is that it doesn’t dry out the air like infrared or gas heaters. Users also don’t have to worry about their children or pets getting too close to it because, even though it gets hot, it can be touched.
To enter the competition follow the steps below:
Competition entry details:
3. The competition closes on 31 July 2018.
4. Winners will be notified via Twitter on 1 August and Takealot.com will be in touch to organise delivery.
5. The competition is only open to South African residents.
Happy Emoji Day! Here’s 10 reasons to be cheerful
First created by Shigetaka Kurita in 1999, the emoji has become a huge part of everyday communication. Whether you love them or hate them, flying dollar bills, applauding hands and rolling eyes are here to stay.
Scientist suggest that the use of emojis will help us gain the same satisfaction from digital interactions as we enjoy from personal contact.
Almost two decades later, and we have over 2600 unique emojis to perfectly express what we feel, thank you Mr Kurita! Join HMD, the home of Nokia phones as we celebrate World Emoji Day on the 17th of July with these interesting emoji facts:
The most popular emoji used is “Person Shrugging”
1. The Nokia 3310 was chosen as one of the first 3 “National” emojis for Finland… it represents unbreakable!
2. South Africa’s favourite emoji is the “Kiss and wink”… how sweet SA!
3. French is the only language where a ‘smiley’ does not top the list for its use
4. On average, over 60 billion emojis are sent on Facebook every day
5. For the first time ever, the Oxford Dictionaries Word of the Year was a pictograph! The “Face with Tears of Joy” was crowned word of the year in 2015
6. According to Emojipedia, some of the most requested emoji’s include afro, a bagel and hands making a heart
7. To include all races, a diversity pack was released in 2017
8. It has become so trendy that the Museum of Modern Art displays the original emoji collection on canvas
9. In 2009, Herman Melville’s classic Moby Dick was completely translated into emoji’s