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Found 677 results for dwarf planet

Puzzle #182: Can you work out the length of the raffle ticket strips?

24 August 2022

set by Katie Steckles

Earth could theoretically host two more moons the same size as the current moon. If the extra moons were smaller, it could have even more.

Physicists work out how many moons Earth could have

12 August 2022

Simulations suggest that Earth could theoretically host two more moons the size of the one we've got now, or several smaller moons

H3C989 Woman and night sky. Watching the stars Woman with telescope.

Now is the best time to see Pluto, our beloved dwarf planet

13 July 2022

Track down a telescope and pray for dark skies, as a chance to see Pluto is coming up, says Abigail Beall

$This side-by-side comparison shows observations of the Southern Ring Nebula in near-infrared light, at left, and mid-infrared light, at right, from NASA???s Webb Telescope. This scene was created by a white dwarf star ??? the remains of a star like our Sun after it shed its outer layers and stopped burning fuel though nuclear fusion. Those outer layers now form the ejected shells all along this view. In the Near-Infrared Camera (NIRCam) image, the white dwarf appears to the lower left of the bright, central star, partially hidden by a diffraction spike. The same star appears ??? but brighter, larger, and redder ??? in the Mid-Infrared Instrument (MIRI) image. This white dwarf star is cloaked in thick layers of dust, which make it appear larger. The brighter star in both images hasn???t yet shed its layers. It closely orbits the dimmer white dwarf, helping to distribute what it???s ejected. Over thousands of years and before it became a white dwarf, the star periodically ejected mass ??? the visible shells of material. As if on repeat, it contracted, heated up ??? and then, unable to push out more material, pulsated. Stellar material was sent in all directions ??? like a rotating sprinkler ??? and provided the ingredients for this asymmetrical landscape. Today, the white dwarf is heating up the gas in the inner regions ??? which appear blue at left and red at right. Both stars are lighting up the outer regions, shown in orange and blue, respectively. The images look very different because NIRCam and MIRI collect different wavelengths of light. NIRCam observes near-infrared light, which is closer to the visible wavelengths our eyes detect. MIRI goes farther into the infrared, picking up mid-infrared wavelengths. The second star more clearly appears in the MIRI image, because this instrument can see the gleaming dust around it, bringing it more clearly into view. The stars ??? and their layers of light ??? steal more attention in the NIRCam image, while dust pl$

James Webb Space Telescope releases dazzling first science images

12 July 2022

Incredibly clear images of the Carina Nebula, the Eight-Burst Nebula, a galaxy cluster called Stephan’s Quintet and an exoplanet named WASP-96b make up the first set of science data from JWST

7 big questions the James Webb Space Telescope is about to answer

6 July 2022

NASA has just released the first full-colour image from the James Webb Space Telescope. Here’s what it is looking at first – and how it will address the biggest mysteries of the universe

KRB4DP This is an artist's impression of the view from the vicinity of a hypothetical terrestrial planet and moon orbiting the red dwarf star AU Microscopii. The relatively newborn 12 million year-old star is surrounded by a very dusty disk of debris from the collision of comets, asteroids, and planetissimals swirling around the young star. Though no planets have been discovered around the star, the disk is strong circumstantial evidence for planets. Not only is it dusty, but also it is warped, possibly by the pull of one or more planets. In this view the glow of starlight reflecting off the disk cre

Mysterious cold blobs may be hiding inside a distant star

10 June 2022

A small star called AU Microscopii seems to contain strange pockets of hydrogen that are more than 1500°C cooler than the rest of the star, and astronomers aren’t sure why

TESS spacecraft in front of Earth and the moon TESS will look at the nearest, brightest stars to find planetary candidates that scientists will observe for years to come. Credits: NASA's Goddard Space Flight Center As the search for life on distant planets heats up, NASA?s Transiting Exoplanet Survey Satellite (TESS) is bringing this hunt closer to home. Launching in 2017-2018, TESS will identify planets orbiting the brightest stars just outside our solar system using what?s known as the transit method. When a planet passes in front of, or transits, its parent star, it blocks some of the star's light. TESS searches for these telltale dips in brightness, which can reveal the planet's presence and provide additional information about it.

Search starlight to help astronomers discover new exoplanets

4 May 2022

Comb through observations from NASA's Transiting Exoplanet Survey Satellite to help find new planets, says Layal Liverpool

Trying to pin down a planet is pointless

27 April 2022

This artist???s impression shows a two-star system where micronovae may occur. The blue disc swirling around the bright white dwarf in the centre of the image is made up of material, mostly hydrogen, stolen from its companion star. Towards the centre of the disc, the white dwarf uses its strong magnetic fields to funnel the hydrogen towards its poles. As the material falls on the hot surface of the star, it triggers a micronova explosion, contained by the magnetic fields at one of the white dwarf???s poles.

Small explosions called micronovae discovered on dead stars

20 April 2022

Micronovae are about 1 million times less bright than a classical nova and last just half a day, but they release as much energy as the sun would in a day

Astronomers still can't agree on what counts as a planet

25 March 2022

In 2006, the International Astronomical Union came up with a new way to classify planets that famously saw Pluto downgraded. Now a new row has started as astronomers try to define exoplanets