Connect with us

Published

on

Every single time NASA shares a picture of space on Twitter or Instagram and explains what it is about, many in the comments section ask how these photographs were taken, whether the colours are real, and, most importantly, they enquire about the cameras that the Hubble Telescope is equipped with. The space agency, in its latest post on Instagram, said it got that question often and, therefore, wanted to break it down for space enthusiasts. To begin with, NASA’s Hubble Space Telescope doesn’t take a snapshot and get the image back in colour, something a mobile phone camera does.

NASA said that Hubble’s camera takes photos over a broad range of wavelengths that come down to Earth in grayscale. This is followed by scientists creating colour images by taking exposures using different colour filters on the telescope, assigning a colour to each filter corresponding to the wavelength, and combining the images.

The space agency said that many of the full-colour photographs shared by Hubble are created after combining three separate exposures — one each taken in red, green, and blue light.

“When mixed, these three colours can recreate almost any colour of light that is visible to human eyes,” NASA said in the post. “That’s how televisions, computer monitors, and video cameras recreate colours to show a picture!”

NASA said that scientists use the closest approximation of the Ultraviolet and Infrared spectrum in the visible light spectrum to represent that information. This, the agency said, is done because we can’t see the colours in the Ultraviolet and Infrared spectrum. It said that the colour in Hubble images is used to highlight interesting features of the celestial object being studied. And then the agency explained it with the help of an example.

Sharing a picture of The Ring Nebula, NASA said that the deep blue colour in the centre, shown in visible light, represents helium, the inner ring, shown in cyan colour, is the glow of hydrogen and oxygen, while the reddish outer ring is from nitrogen and sulphur. So, that’s how the pictures taken by NASA’s Hubble Telescope are created.

Meanwhile, the space agency on Monday shared two photographs of the space on Twitter and wrote: “Hubble’s back!”

One of the pictures shows a three-armed spiral galaxy. NASA added in the caption, “After the Hubble team successfully turned on backup hardware aboard the telescope, the observatory got back to work over the weekend and took these galaxy snapshots.”


Continue Reading

Science

2,300-Year-Old Dwarf Statuette from Alexandria Reveals Ptolemaic Art Insights

Published

on

By

2,300-Year-Old Dwarf Statuette from Alexandria Reveals Ptolemaic Art Insights

A 2,300-year-old marble statuette discovered in Alexandria, Egypt, has offered new insights into how dwarves were perceived during the Ptolemaic period (332–150 B.C.). Depicting a muscular, nude dwarf in motion, the 4-inch sculpture reflects a combination of Egyptian and Greek artistic traditions. Despite missing its arms, legs, and part of the head, the craftsmanship of the piece indicates a highly skilled rendering of human anatomy. It is currently housed at the Metropolitan Museum of Art in New York City.

Depictions of Dwarves in Ptolemaic Art

According to information from the Metropolitan Museum of Art, as reported by Live Science, the statuette incorporates elements from Greek art, such as classical nudity and Hellenistic realism, blended with Egyptian cultural aesthetics. This synthesis points to the cultural exchange that characterised the Ptolemaic dynasty, a period when Egypt was ruled by Ptolemy I Soter, a general of Alexander the Great. The depiction of a dwarf engaged in dance suggests a significant societal role, unlike the exaggerated caricatures of dwarves often seen in Greek art.

Egyptian Perspectives on Dwarves

Historical records indicate that dwarves were highly regarded in ancient Egypt, often serving in the households of nobles and pharaohs. Their association with the god Bes, who was depicted as a short and muscular protector of families and women in childbirth, contributed to their societal acceptance. Bes, known as a dancer and tambourine player, symbolises strength and guardianship in Egyptian mythology. The statuette’s design, which likely depicted the dwarf with a percussion instrument, aligns with this cultural significance.

A Glimpse into Cultural Integration

The artifact demonstrates the integration of different human forms into Egyptian society during the Ptolemaic era. The Met has emphasised that such depictions reflect a broader tradition of valuing diverse body types, setting the Egyptian approach apart from other ancient civilisations. This statuette, though small in size, offers a profound understanding of cultural dynamics during a transformative period in history.

Catch the latest from the Consumer Electronics Show on Gadgets 360, at our CES 2025 hub.

Continue Reading

Science

Lunar Temperature Fluctuations: Understanding the Moon’s Extreme Conditions

Published

on

By

Lunar Temperature Fluctuations: Understanding the Moon's Extreme Conditions

The surface temperature of the moon experiences extreme variations, making it one of the harshest environments in the solar system. During lunar daylight, temperatures can soar to over 100 degrees Celsius, while in darkness, they can plummet to minus 100 degrees Celsius. These fluctuations are caused by the absence of an atmosphere, which on Earth moderates temperature extremes. Instead, the moon’s surface directly absorbs and radiates heat depending on exposure to sunlight.

Lunar Temperature Variations Explained

According to data provided by NASA and analysed by experts, such as John Monnier, a professor of astronomy at the University of Michigan, the moon’s soil, or regolith, significantly influences these temperature shifts. Regolith is a poor conductor of heat, causing rapid temperature changes on the surface while insulating the subsurface. As reported by Live Science, during Apollo missions, measurements indicated that temperatures beneath the surface were warmer by 40 to 45 kelvins compared to the lunar exterior.

Further research using NASA’s Lunar Reconnaissance Orbiter (LRO), launched in 2009, revealed localised thermal anomalies. Findings in 2022 demonstrated that shaded areas within certain lunar pits maintained a consistent temperature of 17 degrees Celsius. These regions are considered promising for future human habitation.

The Moon’s Poles and Extreme Conditions

The lunar poles present unique thermal environments due to the sun’s low angle. Permanently shadowed craters, particularly at the south pole, may host temperatures as low as minus 248.15 degrees Celsius. These craters are shielded not only from direct sunlight but also from secondary heat sources, such as reflected solar radiation. Such locations could hold trapped ice particles, potentially vital for sustaining future lunar exploration missions.

Understanding the moon’s thermal dynamics is essential for designing equipment capable of withstanding its conditions and planning potential settlements. Scientists and engineers continue to study these extremes to ensure that future missions can navigate and thrive in the lunar environment.

Catch the latest from the Consumer Electronics Show on Gadgets 360, at our CES 2025 hub.

Continue Reading

Science

SpaceX Launches 24 Starlink Satellites to Expand Global Internet Coverage

Published

on

By

SpaceX Launches 24 Starlink Satellites to Expand Global Internet Coverage

The first Starlink mission of 2025 was successfully launched by SpaceX from Florida’s Cape Canaveral Space Force Station on January 6, 2025, at 2:13 a.m. IST. A Falcon 9 rocket carried 24 Starlink satellites into orbit, aiming to expand SpaceX’s vast satellite internet network. The launch marked another significant step in SpaceX’s efforts to enhance global connectivity through its growing constellation of satellites.

Details of the Mission

According to a report from space.com, the Falcon 9 rocket’s first stage completed a flawless return to Earth, landing on the droneship “Just Read the Instructions,” positioned in the Atlantic Ocean. This milestone represented the 17th launch and recovery for this particular booster. SpaceX confirmed that this booster has supported 10 prior Starlink missions and was used in the Crew-5 mission, which transported astronauts to the International Space Station.

The upper stage of the rocket is expected to deploy the 24 satellites into low Earth orbit approximately 65 minutes after liftoff. These satellites will join the more than 6,850 active Starlink spacecraft currently operating, as stated to space.com by astrophysicist Jonathan McDowell, who tracks satellite constellations.

Starlink, developed by SpaceX, is the largest satellite network in history. Its purpose is to deliver high-speed internet access globally, including remote and underserved areas. With launches like this, the constellation continues to grow, reinforcing SpaceX’s position as a leader in satellite-based internet services. This launch follows a year of record-breaking achievements for SpaceX, which conducted numerous successful missions in 2024. The company remains focused on accelerating its deployment of satellites, with regular launches planned throughout 2025.

As SpaceX continues its Starlink initiative, its impact on global connectivity and advancements in reusable rocket technology remain noteworthy. The company’s commitment to innovation in space exploration is expected to shape the future of satellite communications.

Catch the latest from the Consumer Electronics Show on Gadgets 360, at our CES 2025 hub.

Continue Reading

Trending