91色情片

Regulars

HCNBCF THOR: THE DARK WORLD, Chris Hemsworth as Thor, 2013. ph: Jay Maidment/?Walt Disney Studios/courtesy Everett Collection

Could you make a machine that 鈥渇lew鈥� like Thor鈥檚 hammer in the comics?

Such machines already exist, in a sense, say our readers - but an immortal being might also be using effects science has yet to understand

Regulars
This mosaic of Mars is a compilation of images captured by the Viking Orbiter 1. The center of the scene shows the entire Valles Marineris canyon system, more than 2,000 miles (3,000 kilometers) long, 370 miles (600 kilometers) wide and 5 miles (8 kilometers) deep, extending from Noctis Labyrinthus, the arcuate system of graben to the west, to the chaotic terrain to the east.

If humans colonised Mars, how would they calculate time? (Part 2)

Regulars
HDTNNH Crab-eating macaca in Thailand ; specie Macaca fascicularis family of Cercopithecidae

This week鈥檚 new questions

Regulars

Could a cat nose function as a ‘highly efficient’ gas chromatograph?

Regulars

Tom Gauld on a physicist’s summer holiday

Regulars

Twisteddoodles gives Earth a makeover

Regulars
Solar Flare X1 from AR2994 in ?Motion? ? Miguel Claro Photograph of the Sun taken from a 27-minute timelapse of a solar, flare which took place on 30 April 2022. Taken with a Sky-Watcher Esprit ED120 telescope, Daystar Quark Chromosphere filter, Sky-Watcher EQ6 mount, Player One Apollo M-Max Solar camera, 840 mm, 900 frames at 9.1 ms per frame (recorded as video at 109 FPS) Location: Dark Sky Alqueva region, ?vora district, Portugal

91色情片

See the remarkable photos up for Astronomy Photographer of the Year

Regulars
https://www.esa.int/ESA_Multimedia/Images/2017/07/Exploring_Jupiter t may still be some years away from launch, and over a decade before our Jupiter Icy Moons Explorer reaches the gas giant and its icy moons, but preparations are well under way. This new artist?s impression depicts the final spacecraft design, the construction of which is being overseen by Airbus Defence and Space. The spacecraft?s solar wings form a distinctive cross-shape totalling 97 sq m, the largest ever flown on an interplanetary mission. The size is essential to generate sufficient power ? around 850 W ? for the instruments and spacecraft so far from the Sun. The spacecraft is furnished with a laboratory of instruments that will investigate Jupiter?s turbulent atmosphere and vast magnetosphere, as well as study the planet-sized moons Ganymede, Europa and Callisto. All three moons are thought to have oceans of liquid water beneath their icy crusts and should provide key clues on the potential for such moons to harbour habitable environments. Juice?s cameras will capture exquisite details of the moon?s features, as well as identify the ices and minerals on their surfaces. Other instruments will sound the subsurface and interior of the moons to better understand the location and nature of their buried oceans. The tenuous atmosphere around the moons will also be explored. The spacecraft will also include booms such as a 10 m-long magnetometer mast (seen towards the bottom of Juice in the artist impression), a 16 m radar antenna (the long boom across the top), and antennas to measure electric and magnetic fields. Ganymede is the only moon in the Solar System to generate its own internal magnetic field, and Juice is well equipped to document its behaviour and explore its interaction with Jupiter?s own magnetosphere. Juice is scheduled for launch in 2022 on a seven-year journey to the Jovian system. Its tour will include a dedicated orbit phase of Jupiter, targeted flybys of Europa, Ganymede and Callisto, and finally nine months orbiting Ganymede ? the first time any moon beyond our own has been orbited by a spacecraft. In the artist?s impression, which is not to scale, Ganymede is shown in the foreground, Callisto to the far right, and Europa centre-right. Volcanically active moon Io is also shown, at left. The moons were imaged by NASA?s Galileo spacecraft; Jupiter is seen here with a vivid aurora, captured by the NASA/ESA Hubble Space Telescope. ESA/ATG medialab; Jupiter: NASA/ESA/J. Nichols (University of Leicester); Ganymede: NASA/JPL; Io: NASA/JPL/University of Arizona; Callisto and Europa: NASA/JPL/DLR

Space

How to spot Jupiter’s icy moons

Regulars
2AFPK7B Cyclist and Runner on Trail

If a cyclist and runner exercise together, who expends more energy?

Regulars
Close up to the dictionary definition of Phlegmatic; Shutterstock ID 1188169102; purchase_order: -; job: -; client: -; other: -

Why do I need to be able to pronounce a word to recall it?

Humans evolved to remember sounds, not letters, so this isn鈥檛 surprising, say our readers 鈥� but we can easily remember words for which we have conceived an incorrect pronunciation

Regulars

Is there a correct way to fill a dishwasher? (continued)

Regulars

This week鈥檚 new questions

Regulars

Academia鈥檚 love affair with flowers hasn鈥檛 been the same since Freud

Regulars

Tom Gauld on a grant proposal mix-up

Regulars