Space questions This is a list of recently added questions about space. Play space quiz and see all the questions. What is the second brightest star in the night time sky, after Sirius?Canopus is the brightest star in the southern constellation of Carina, and the second brightest star in the night time sky, after Sirius. Its name is generally considered to originate from the mythological Canopus, who was a navigator for Menelaus, king of Sparta.Created by: Ninjaivery hard 20% ArcturusArcturus3CanopusCanopus8VegaVega23ProcyonProcyon5stars riddles » What type of plasma is Sun composed of?Hot. The Sun is a nearly perfect sphere of hot plasma, with internal convective motion that generates a magnetic field via a dynamo process. Hot plasmas (thermal plasmas) have electrons and the heavy particles at the same temperature, i.e. they are in thermal equilibrium with each other. Cold plasmas (nonthermal plasmas) on the other hand have the ions and neutrals at a much lower temperature, whereas electrons are much "hotter".Created by: Ninjaihard 40% coldcold493hothot1815ultracoldultracold901none of the abovenone of the above1252Sun riddles » Which space probe is the farthest from Earth?Voyager 1 is a space probe launched by NASA on September 5, 1977 as a part of the Voyager program to study the outer Solar System. At a distance of 141 AU, approximately 13 billion miles (21 billion km), from the Sun, it is the farthest spacecraft and man-made object from Earth.Created by: Ninjaivery hard 39% Voyager 1Voyager 12465Voyager 2Voyager 21955Pioneer 10Pioneer 10899Pioneer 11Pioneer 11863universe riddles » How is the visible surface of the Sun called?Photosphere. The photosphere is a layer below which the Sun becomes opaque to visible light. It is tens to hundreds of kilometers thick, and is slightly less opaque than air on Earth. Because the upper part of the photosphere is cooler than the lower part, an image of the Sun appears brighter in the center than on the edge or limb of the solar disk, in a phenomenon known as limb darkening.Created by: Ninjaivery hard 32% chromospherechromosphere457coronacorona1096stratospherestratosphere336photospherephotosphere899Solar System riddles » What are BL Lacertae object ? Star-like objects. BL Lac objects are defined as possessing the following characteristics: star-like, surrounded by nebulosity; large and sometimes rapid light variations; up to 35% polarization with rapid changes in angle and degree; and optical spectral features generally weak or undetected. Created by: Tschuka very hard 37% Double starsDouble stars18Star-like objectsStar-like objects121Variable starsVariable stars53magnetic bodiesmagnetic bodies134astronomy riddles » The Perseids are prolific meteor showers. Which comet are they associated with?109PSwift–Tuttle. The Perseids are prolific meteor showers associated with the comet Swift–Tuttle. The Perseids are so called because the point from which they appear to hail lies in the constellation Perseus. The shower is visible from mid-July each year, with the peak in activity between 9 and 14 August, depending on the particular location of the stream. During the peak, the rate of meteors reaches 60 or more per hour. Created by: Tschuka hard 41% HyakutakeHyakutake34HalleyHalley121Hale-BoppHale-Bopp120109PSwift–Tuttle109PSwift–Tuttle197astronomy riddles » What does the word "planet" mean?"wandering stars" . The word is typically traced back to the ancient Greeks, who believed the Earth was stationary at the center of the universe while objects in the sky revolved around it. The Greek term asters planetai mean "wandering stars" and described the tiny lights that moved across the sky more dramatically than stars when compared over weeks and months. These wandering stars, back then, amounted to Mercury, Venus, Mars, Jupiter and Saturn.Created by: Tschuka very hard 27% "round object""round object"43"wandering stars" "wandering stars" 62"celestial body""celestial body"74"rocky star""rocky star"49astronomy riddles » Where is the World's largest meteorite ?In Namibia. The Hoba meteorite lies on the farm "Hoba West", not far from Grootfontein, in the Otjozondjupa Region of Namibia. It has been uncovered but, because of its large mass, has never been moved from where it fell. The main mass is estimated at more than 60 tonnes, making it the largest known meteoritethe in World. It is the most massive naturally occurring piece of iron known on Earth's surface.Created by: Tschuka very hard 26% in Mexicoin Mexico62in Greenlandin Greenland23in Namibiain Namibia56in Siberiain Siberia69records riddles » Which solar system moon is the only one with a dense atmosphere?Titan is the largest moon of Saturn. It is the only moon known to have a dense atmosphere, and the only object in space other than Earth where clear evidence of stable bodies of surface liquid has been found.Created by: Tschuka hard 46% TitanTitan706IoIo228EuropeEurope392GanimedesGanimedes198Moon riddles » Orion Nebula, visible to the naked eye, is a type of...Emission nebula. An emission nebula is a nebula formed of ionized gases that emit light of various wavelengths. The most common source of ionization is high-energy photons emitted from a nearby hot star. The nebula's color depends on its chemical composition and degree of ionization. Due to the prevalence of hydrogen in interstellar gas, and its relatively low energy of ionization, many emission nebulae appear red due to the strong emissions of the Balmer series.Created by: Ninjaivery hard 30% reflection nebulareflection nebula535emission nebulaemission nebula1165planetary nebulaplanetary nebula528supernova remnantsupernova remnant1562universe riddles » Play space quiz and see all the questions.